13157949 has 16 divisors (see below), whose sum is σ = 21230208. Its totient is φ = 7076352.

The previous prime is 13157927. The next prime is 13157951. The reversal of 13157949 is 94975131.

It is a happy number.

13157949 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13157949 - 2⁷ = 13157821 is a prime.

13157949 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13157959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18072 + ... + 18785.

It is an arithmetic number, because the mean of its divisors is an integer number (1326888).

Almost surely, 2^13157949 is an apocalyptic number.

It is an amenable number.

13157949 is a deficient number, since it is larger than the sum of its proper divisors (8072259).

13157949 is a wasteful number, since it uses less digits than its factorization.

13157949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36884.

The product of its digits is 34020, while the sum is 39.

The square root of 13157949 is about 3627.3887302025. The cubic root of 13157949 is about 236.0819223874.

The spelling of 13157949 in words is "thirteen million, one hundred fifty-seven thousand, nine hundred forty-nine".