129313408 has 32 divisors (see below), whose sum is σ = 294420960. Its totient is φ = 55419648.

The previous prime is 129313399. The next prime is 129313421. The reversal of 129313408 is 804313921.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 129313408.

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, 71266 + ... + 73057.

It is an arithmetic number, because the mean of its divisors is an integer number (9200655).

Almost surely, 2^129313408 is an apocalyptic number.

It is an amenable number.

129313408 is an abundant number, since it is smaller than the sum of its proper divisors (165107552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129313408 is an equidigital number, since it uses as much as digits as its factorization.

129313408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144344 (or 144332 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 129313408 is about 11371.6053396167. The cubic root of 129313408 is about 505.6862975593.

The spelling of 129313408 in words is "one hundred twenty-nine million, three hundred thirteen thousand, four hundred eight".