129871964 has 12 divisors (see below), whose sum is σ = 230389824. Its totient is φ = 64046304.

The previous prime is 129871949. The next prime is 129871967. The reversal of 129871964 is 469178921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129871967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222092 + ... + 222675.

It is an arithmetic number, because the mean of its divisors is an integer number (19199152).

Almost surely, 2^129871964 is an apocalyptic number.

It is an amenable number.

129871964 is a deficient number, since it is larger than the sum of its proper divisors (100517860).

129871964 is a wasteful number, since it uses less digits than its factorization.

129871964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444844 (or 444842 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 129871964 is about 11396.1381178011. The cubic root of 129871964 is about 506.4133384642.

The spelling of 129871964 in words is "one hundred twenty-nine million, eight hundred seventy-one thousand, nine hundred sixty-four".