11939618 has 4 divisors (see below), whose sum is σ = 17909430. Its totient is φ = 5969808.

The previous prime is 11939563. The next prime is 11939621. The reversal of 11939618 is 81693911.

11939618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81693911 = 13 ⋅6284147.

It can be written as a sum of positive squares in only one way, i.e., 9259849 + 2679769 = 3043^2 + 1637^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2984903 + ... + 2984906.

Almost surely, 2^11939618 is an apocalyptic number.

11939618 is a deficient number, since it is larger than the sum of its proper divisors (5969812).

11939618 is an equidigital number, since it uses as much as digits as its factorization.

11939618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5969811.

The product of its digits is 11664, while the sum is 38.

The square root of 11939618 is about 3455.3752328799. The cubic root of 11939618 is about 228.5582018760.

The spelling of 11939618 in words is "eleven million, nine hundred thirty-nine thousand, six hundred eighteen".