11922979 has 2 divisors, whose sum is σ = 11922980. Its totient is φ = 11922978.

The previous prime is 11922943. The next prime is 11923019. The reversal of 11922979 is 97922911.

It is a happy number.

It is an a-pointer prime, because the next prime (11923019) can be obtained adding 11922979 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11922979 - 2⁹ = 11922467 is a prime.

It is not a weakly prime, because it can be changed into another prime (11922479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5961489 + 5961490.

It is an arithmetic number, because the mean of its divisors is an integer number (5961490).

Almost surely, 2^11922979 is an apocalyptic number.

11922979 is a deficient number, since it is larger than the sum of its proper divisors (1).

11922979 is an equidigital number, since it uses as much as digits as its factorization.

11922979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 40.

The square root of 11922979 is about 3452.9666954664. The cubic root of 11922979 is about 228.4519799434.

The spelling of 11922979 in words is "eleven million, nine hundred twenty-two thousand, nine hundred seventy-nine".