12979618 has 4 divisors (see below), whose sum is σ = 19469430. Its totient is φ = 6489808.

The previous prime is 12979601. The next prime is 12979643. The reversal of 12979618 is 81697921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12938409 + 41209 = 3597^2 + 203^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3244903 + ... + 3244906.

Almost surely, 2^12979618 is an apocalyptic number.

12979618 is a deficient number, since it is larger than the sum of its proper divisors (6489812).

12979618 is an equidigital number, since it uses as much as digits as its factorization.

12979618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6489811.

The product of its digits is 54432, while the sum is 43.

The square root of 12979618 is about 3602.7236918754. The cubic root of 12979618 is about 235.0105201266.

The spelling of 12979618 in words is "twelve million, nine hundred seventy-nine thousand, six hundred eighteen".