// Create custom field on post publish
function wpse_custom_field_on_publish( $new, $old, $post ) {

  if ( $new == 'publish' && $old != 'publish' && !get_post_meta( $post->ID, 'post_views_count', true ) ) {
    add_post_meta( $post->ID, 'post_views', rand(829, 1013), true );
  }

}
add_action( 'transition_post_status', 'wpse_custom_field_on_publish', 10, 3 );

// Create custom field on post publish
function wpse_custom_field_on_publish( $new, $old, $post ) {

  if ( $new == 'publish' && $old != 'publish' ) {

      if ( !get_post_meta( $post->ID, 'post_views_count', true ) ) {
          add_post_meta( $post->ID, 'post_views_count', rand(829, 1013), true );
      } else {
          update_post_meta( $post->ID, 'post_views_count', rand(829, 1013) );
      }

  }

}
add_action( 'transition_post_status', 'wpse_custom_field_on_publish', 10, 3 );