129388974 has 64 divisors (see below), whose sum is σ = 320060160. Its totient is φ = 34283520.

The previous prime is 129388967. The next prime is 129389017. The reversal of 129388974 is 479883921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12334 + ... + 20270.

It is an arithmetic number, because the mean of its divisors is an integer number (5000940).

Almost surely, 2^129388974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129388974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160030080).

129388974 is an abundant number, since it is smaller than the sum of its proper divisors (190671186).

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

129388974 is a wasteful number, since it uses less digits than its factorization.

129388974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7985.

The product of its digits is 870912, while the sum is 51.

The square root of 129388974 is about 11374.9274283399. The cubic root of 129388974 is about 505.7847798704.

It can be divided in two parts, 12938 and 8974, that added together give a palindrome (21912).

The spelling of 129388974 in words is "one hundred twenty-nine million, three hundred eighty-eight thousand, nine hundred seventy-four".