129312613 has 8 divisors (see below), whose sum is σ = 138151520. Its totient is φ = 120677040.

The previous prime is 129312611. The next prime is 129312649. The reversal of 129312613 is 316213921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129312613 - 2¹ = 129312611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129312611) 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, 49518 + ... + 52063.

It is an arithmetic number, because the mean of its divisors is an integer number (17268940).

Almost surely, 2^129312613 is an apocalyptic number.

It is an amenable number.

129312613 is a deficient number, since it is larger than the sum of its proper divisors (8838907).

129312613 is a wasteful number, since it uses less digits than its factorization.

129312613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101667.

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

The square root of 129312613 is about 11371.5703840762. The cubic root of 129312613 is about 505.6852612619.

The spelling of 129312613 in words is "one hundred twenty-nine million, three hundred twelve thousand, six hundred thirteen".