129312316 has 24 divisors (see below), whose sum is σ = 259975520. Its totient is φ = 55130112.

The previous prime is 129312307. The next prime is 129312317. The reversal of 129312316 is 613213921.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129312317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6561 + ... + 17368.

Almost surely, 2^129312316 is an apocalyptic number.

It is an amenable number.

129312316 is an abundant number, since it is smaller than the sum of its proper divisors (130663204).

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

129312316 is a wasteful number, since it uses less digits than its factorization.

129312316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24133 (or 24131 counting only the distinct ones).

The product of its digits is 1944, while the sum is 28.

The square root of 129312316 is about 11371.5573251864. The cubic root of 129312316 is about 505.6848741158.

It can be divided in two parts, 129 and 312316, that added together give a triangular number (312445 = T₇₉₀).

The spelling of 129312316 in words is "one hundred twenty-nine million, three hundred twelve thousand, three hundred sixteen".