129133864 has 16 divisors (see below), whose sum is σ = 246695220. Its totient is φ = 63348480.

The previous prime is 129133813. The next prime is 129133903. The reversal of 129133864 is 468331921.

It can be written as a sum of positive squares in 2 ways, for example, as 128822500 + 311364 = 11350^2 + 558^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151857 + ... + 152704.

Almost surely, 2^129133864 is an apocalyptic number.

It is an amenable number.

129133864 is a deficient number, since it is larger than the sum of its proper divisors (117561356).

129133864 is a wasteful number, since it uses less digits than its factorization.

129133864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304620 (or 304616 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 129133864 is about 11363.7081975911. The cubic root of 129133864 is about 505.4521506788.

The spelling of 129133864 in words is "one hundred twenty-nine million, one hundred thirty-three thousand, eight hundred sixty-four".