11979399 has 16 divisors (see below), whose sum is σ = 16391808. Its totient is φ = 7779552.

The previous prime is 11979391. The next prime is 11979433. The reversal of 11979399 is 99397911.

It is not a de Polignac number, because 11979399 - 2³ = 11979391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11979391) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 21229 + ... + 21785.

It is an arithmetic number, because the mean of its divisors is an integer number (1024488).

Almost surely, 2^11979399 is an apocalyptic number.

11979399 is a deficient number, since it is larger than the sum of its proper divisors (4412409).

11979399 is a wasteful number, since it uses less digits than its factorization.

11979399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734.

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

The square root of 11979399 is about 3461.1268396290. The cubic root of 11979399 is about 228.8117609221.

The spelling of 11979399 in words is "eleven million, nine hundred seventy-nine thousand, three hundred ninety-nine".