129263432 has 8 divisors (see below), whose sum is σ = 242368950. Its totient is φ = 64631712.

The previous prime is 129263417. The next prime is 129263443. The reversal of 129263432 is 234362921.

It can be written as a sum of positive squares in only one way, i.e., 109956196 + 19307236 = 10486^2 + 4394^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8078957 + ... + 8078972.

Almost surely, 2^129263432 is an apocalyptic number.

It is an amenable number.

129263432 is a deficient number, since it is larger than the sum of its proper divisors (113105518).

129263432 is a wasteful number, since it uses less digits than its factorization.

129263432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16157935 (or 16157931 counting only the distinct ones).

The product of its digits is 15552, while the sum is 32.

The square root of 129263432 is about 11369.4077242396. The cubic root of 129263432 is about 505.6211446486.

The spelling of 129263432 in words is "one hundred twenty-nine million, two hundred sixty-three thousand, four hundred thirty-two".