13970618 has 4 divisors (see below), whose sum is σ = 20955930. Its totient is φ = 6985308.

The previous prime is 13970581. The next prime is 13970633. The reversal of 13970618 is 81607931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81607931 = 727 ⋅112253.

It can be written as a sum of positive squares in only one way, i.e., 13890529 + 80089 = 3727^2 + 283^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3492653 + ... + 3492656.

Almost surely, 2^13970618 is an apocalyptic number.

13970618 is a deficient number, since it is larger than the sum of its proper divisors (6985312).

13970618 is an equidigital number, since it uses as much as digits as its factorization.

13970618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6985311.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 13970618 is about 3737.7289896406. The cubic root of 13970618 is about 240.8455016607.

The spelling of 13970618 in words is "thirteen million, nine hundred seventy thousand, six hundred eighteen".