129408704 has 14 divisors (see below), whose sum is σ = 256795524. Its totient is φ = 64704320.

The previous prime is 129408683. The next prime is 129408737. The reversal of 129408704 is 407804921.

It is a super-2 number, since 2×129408704² = 33493225341919232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010942 + ... + 1011069.

Almost surely, 2^129408704 is an apocalyptic number.

It is an amenable number.

129408704 is a deficient number, since it is larger than the sum of its proper divisors (127386820).

129408704 is an equidigital number, since it uses as much as digits as its factorization.

129408704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022023 (or 2022013 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 129408704 is about 11375.7946535616. The cubic root of 129408704 is about 505.8104869205.

The spelling of 129408704 in words is "one hundred twenty-nine million, four hundred eight thousand, seven hundred four".