13157686 has 8 divisors (see below), whose sum is σ = 19858104. Its totient is φ = 6538320.

The previous prime is 13157663. The next prime is 13157689. The reversal of 13157686 is 68675131.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13157689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19855 + ... + 20506.

It is an arithmetic number, because the mean of its divisors is an integer number (2482263).

Almost surely, 2^13157686 is an apocalyptic number.

13157686 is a deficient number, since it is larger than the sum of its proper divisors (6700418).

13157686 is a wasteful number, since it uses less digits than its factorization.

13157686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40526.

The product of its digits is 30240, while the sum is 37.

The square root of 13157686 is about 3627.3524780479. The cubic root of 13157686 is about 236.0803494483.

The spelling of 13157686 in words is "thirteen million, one hundred fifty-seven thousand, six hundred eighty-six".