129959694 has 16 divisors (see below), whose sum is σ = 288799440. Its totient is φ = 43319880.

The previous prime is 129959681. The next prime is 129959723. The reversal of 129959694 is 496959921.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 2406661 = 129959694 / (1 + 2 + 9 + 9 + 5 + 9 + 6 + 9 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 129959694.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1203277 + ... + 1203384.

It is an arithmetic number, because the mean of its divisors is an integer number (18049965).

Almost surely, 2^129959694 is an apocalyptic number.

129959694 is an abundant number, since it is smaller than the sum of its proper divisors (158839746).

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

129959694 is a wasteful number, since it uses less digits than its factorization.

129959694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406672 (or 2406666 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 54.

The square root of 129959694 is about 11399.9865789395. The cubic root of 129959694 is about 506.5273421357.

The spelling of 129959694 in words is "one hundred twenty-nine million, nine hundred fifty-nine thousand, six hundred ninety-four".