11939979 has 8 divisors (see below), whose sum is σ = 16308432. Its totient is φ = 7765760.

The previous prime is 11939959. The next prime is 11940017. The reversal of 11939979 is 97993911.

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

It is a cyclic number.

It is not a de Polignac number, because 11939979 - 2⁵ = 11939947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11939959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48414 + ... + 48659.

It is an arithmetic number, because the mean of its divisors is an integer number (2038554).

Almost surely, 2^11939979 is an apocalyptic number.

11939979 is a deficient number, since it is larger than the sum of its proper divisors (4368453).

11939979 is an equidigital number, since it uses as much as digits as its factorization.

11939979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97117.

The product of its digits is 137781, while the sum is 48.

The square root of 11939979 is about 3455.4274699377. The cubic root of 11939979 is about 228.5605053746.

The spelling of 11939979 in words is "eleven million, nine hundred thirty-nine thousand, nine hundred seventy-nine".