13957618 has 4 divisors (see below), whose sum is σ = 20936430. Its totient is φ = 6978808.

The previous prime is 13957591. The next prime is 13957627. The reversal of 13957618 is 81675931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81675931 = 1423 ⋅57397.

It can be written as a sum of positive squares in only one way, i.e., 13564489 + 393129 = 3683^2 + 627^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3489403 + ... + 3489406.

Almost surely, 2^13957618 is an apocalyptic number.

13957618 is a deficient number, since it is larger than the sum of its proper divisors (6978812).

13957618 is an equidigital number, since it uses as much as digits as its factorization.

13957618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6978811.

The product of its digits is 45360, while the sum is 40.

The square root of 13957618 is about 3735.9895610133. The cubic root of 13957618 is about 240.7707742774.

The spelling of 13957618 in words is "thirteen million, nine hundred fifty-seven thousand, six hundred eighteen".