11979515 has 8 divisors (see below), whose sum is σ = 14400720. Its totient is φ = 9566752.

The previous prime is 11979511. The next prime is 11979553. The reversal of 11979515 is 51597911.

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 11979515 - 2² = 11979511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11979511) 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, 1616 + ... + 5154.

It is an arithmetic number, because the mean of its divisors is an integer number (1800090).

Almost surely, 2^11979515 is an apocalyptic number.

11979515 is a deficient number, since it is larger than the sum of its proper divisors (2421205).

11979515 is an equidigital number, since it uses as much as digits as its factorization.

11979515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4221.

The product of its digits is 14175, while the sum is 38.

The square root of 11979515 is about 3461.1435971366. The cubic root of 11979515 is about 228.8124994700.

The spelling of 11979515 in words is "eleven million, nine hundred seventy-nine thousand, five hundred fifteen".