13113657 has 20 divisors (see below), whose sum is σ = 20444160. Its totient is φ = 8361144.

The previous prime is 13113643. The next prime is 13113671. The reversal of 13113657 is 75631131.

13113657 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 3 + 657 = 666.

It is an interprime number because it is at equal distance from previous prime (13113643) and next prime (13113671).

It is not a de Polignac number, because 13113657 - 2⁶ = 13113593 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 13113657.

It is not an unprimeable number, because it can be changed into a prime (13113637) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1657 + ... + 5382.

It is an arithmetic number, because the mean of its divisors is an integer number (1022208).

Almost surely, 2^13113657 is an apocalyptic number.

It is an amenable number.

13113657 is a deficient number, since it is larger than the sum of its proper divisors (7330503).

13113657 is an equidigital number, since it uses as much as digits as its factorization.

13113657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7074 (or 7065 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 13113657 is about 3621.2783654395. The cubic root of 13113657 is about 235.8167266654.

Adding to 13113657 its reverse (75631131), we get a palindrome (88744788).

The spelling of 13113657 in words is "thirteen million, one hundred thirteen thousand, six hundred fifty-seven".