13157679929 has 4 divisors (see below), whose sum is σ = 13611393060. Its totient is φ = 12703966800.

The previous prime is 13157679923. The next prime is 13157679967. The reversal of 13157679929 is 92997675131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3192250000 + 9965429929 = 56500^2 + 99827^2 .

It is a cyclic number.

It is not a de Polignac number, because 13157679929 - 2¹² = 13157675833 is a prime.

It is a super-2 number, since 2×13157679929² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13157679923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226856522 + ... + 226856579.

It is an arithmetic number, because the mean of its divisors is an integer number (3402848265).

Almost surely, 2^13157679929 is an apocalyptic number.

It is an amenable number.

13157679929 is a deficient number, since it is larger than the sum of its proper divisors (453713131).

13157679929 is an equidigital number, since it uses as much as digits as its factorization.

13157679929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453713130.

The product of its digits is 6429780, while the sum is 59.

The spelling of 13157679929 in words is "thirteen billion, one hundred fifty-seven million, six hundred seventy-nine thousand, nine hundred twenty-nine".