11913979 has 8 divisors (see below), whose sum is σ = 14853888. Its totient is φ = 9283560.

The previous prime is 11913959. The next prime is 11914003. The reversal of 11913979 is 97931911.

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

It is not a de Polignac number, because 11913979 - 2⁹ = 11913467 is a prime.

It is a super-2 number, since 2×11913979² = 283885791224882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11913959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77287 + ... + 77440.

It is an arithmetic number, because the mean of its divisors is an integer number (1856736).

Almost surely, 2^11913979 is an apocalyptic number.

11913979 is a deficient number, since it is larger than the sum of its proper divisors (2939909).

11913979 is a wasteful number, since it uses less digits than its factorization.

11913979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154745.

The product of its digits is 15309, while the sum is 40.

The square root of 11913979 is about 3451.6632222742. The cubic root of 11913979 is about 228.3944835360.

The spelling of 11913979 in words is "eleven million, nine hundred thirteen thousand, nine hundred seventy-nine".