11949979 has 2 divisors, whose sum is σ = 11949980. Its totient is φ = 11949978.

The previous prime is 11949967. The next prime is 11950007. The reversal of 11949979 is 97994911.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11949979 - 2⁷ = 11949851 is a prime.

It is not a weakly prime, because it can be changed into another prime (11944979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5974989 + 5974990.

It is an arithmetic number, because the mean of its divisors is an integer number (5974990).

Almost surely, 2^11949979 is an apocalyptic number.

11949979 is a deficient number, since it is larger than the sum of its proper divisors (1).

11949979 is an equidigital number, since it uses as much as digits as its factorization.

11949979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 49.

The square root of 11949979 is about 3456.8741660639. The cubic root of 11949979 is about 228.6242957511.

The spelling of 11949979 in words is "eleven million, nine hundred forty-nine thousand, nine hundred seventy-nine".