11979715 has 16 divisors (see below), whose sum is σ = 15805440. Its totient is φ = 8644320.

The previous prime is 11979659. The next prime is 11979719. The reversal of 11979715 is 51797911.

It is not a de Polignac number, because 11979715 - 2⁷ = 11979587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11979719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6862 + ... + 8428.

It is an arithmetic number, because the mean of its divisors is an integer number (987840).

Almost surely, 2^11979715 is an apocalyptic number.

11979715 is a deficient number, since it is larger than the sum of its proper divisors (3825725).

11979715 is a wasteful number, since it uses less digits than its factorization.

11979715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722.

The product of its digits is 19845, while the sum is 40.

The square root of 11979715 is about 3461.1724892007. The cubic root of 11979715 is about 228.8137728171.

The spelling of 11979715 in words is "eleven million, nine hundred seventy-nine thousand, seven hundred fifteen".