12519979 has 2 divisors, whose sum is σ = 12519980. Its totient is φ = 12519978.

The previous prime is 12519971. The next prime is 12519989. The reversal of 12519979 is 97991521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12519979 - 2³ = 12519971 is a prime.

It is not a weakly prime, because it can be changed into another prime (12519971) 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 as a sum of consecutive naturals, namely, 6259989 + 6259990.

It is an arithmetic number, because the mean of its divisors is an integer number (6259990).

Almost surely, 2^12519979 is an apocalyptic number.

12519979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12519979 is an equidigital number, since it uses as much as digits as its factorization.

12519979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 43.

The square root of 12519979 is about 3538.3582351141. The cubic root of 12519979 is about 232.2030216017.

The spelling of 12519979 in words is "twelve million, five hundred nineteen thousand, nine hundred seventy-nine".