11979217 has 4 divisors (see below), whose sum is σ = 12046320. Its totient is φ = 11912116.

The previous prime is 11979173. The next prime is 11979239. The reversal of 11979217 is 71297911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11979217 - 2⁷ = 11979089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11979277) 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 3 ways as a sum of consecutive naturals, for example, 33283 + ... + 33640.

It is an arithmetic number, because the mean of its divisors is an integer number (3011580).

Almost surely, 2^11979217 is an apocalyptic number.

It is an amenable number.

11979217 is a deficient number, since it is larger than the sum of its proper divisors (67103).

11979217 is an equidigital number, since it uses as much as digits as its factorization.

11979217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67102.

The product of its digits is 7938, while the sum is 37.

The square root of 11979217 is about 3461.1005475138. The cubic root of 11979217 is about 228.8106021564.

The spelling of 11979217 in words is "eleven million, nine hundred seventy-nine thousand, two hundred seventeen".