129292916 has 24 divisors (see below), whose sum is σ = 235339104. Its totient is φ = 62102880.

The previous prime is 129292907. The next prime is 129292921. The reversal of 129292916 is 619292921.

It is a happy number.

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, 4331 + ... + 16653.

It is an arithmetic number, because the mean of its divisors is an integer number (9805796).

Almost surely, 2^129292916 is an apocalyptic number.

It is an amenable number.

129292916 is a deficient number, since it is larger than the sum of its proper divisors (106046188).

129292916 is a wasteful number, since it uses less digits than its factorization.

129292916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12431 (or 12429 counting only the distinct ones).

The product of its digits is 34992, while the sum is 41.

The square root of 129292916 is about 11370.7042877739. The cubic root of 129292916 is about 505.6595844979.

The spelling of 129292916 in words is "one hundred twenty-nine million, two hundred ninety-two thousand, nine hundred sixteen".