13975618 has 8 divisors (see below), whose sum is σ = 20985660. Its totient is φ = 6980400.

The previous prime is 13975609. The next prime is 13975627. The reversal of 13975618 is 81657931.

It is an interprime number because it is at equal distance from previous prime (13975609) and next prime (13975627).

It can be written as a sum of positive squares in 2 ways, for example, as 12981609 + 994009 = 3603^2 + 997^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 933 + ... + 5368.

Almost surely, 2^13975618 is an apocalyptic number.

13975618 is a deficient number, since it is larger than the sum of its proper divisors (7010042).

13975618 is a wasteful number, since it uses less digits than its factorization.

13975618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7412.

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

The square root of 13975618 is about 3738.3977851481. The cubic root of 13975618 is about 240.8742306183.

It can be divided in two parts, 139 and 75618, that added together give a palindrome (75757).

The spelling of 13975618 in words is "thirteen million, nine hundred seventy-five thousand, six hundred eighteen".