12105979 has 2 divisors, whose sum is σ = 12105980. Its totient is φ = 12105978.

The previous prime is 12105941. The next prime is 12106009. The reversal of 12105979 is 97950121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12105979 - 2⁷ = 12105851 is a prime.

It is equal to p₇₉₄₅₂₇ and since 12105979 and 794527 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12106979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6052989 + 6052990.

It is an arithmetic number, because the mean of its divisors is an integer number (6052990).

Almost surely, 2^12105979 is an apocalyptic number.

12105979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12105979 is an equidigital number, since it uses as much as digits as its factorization.

12105979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 12105979 is about 3479.3647408687. The cubic root of 12105979 is about 229.6148500453.

The spelling of 12105979 in words is "twelve million, one hundred five thousand, nine hundred seventy-nine".