12729979 has 2 divisors, whose sum is σ = 12729980. Its totient is φ = 12729978.

The previous prime is 12729973. The next prime is 12730007. The reversal of 12729979 is 97992721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12729979 - 2⁵ = 12729947 is a prime.

It is not a weakly prime, because it can be changed into another prime (12729973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6364989 + 6364990.

It is an arithmetic number, because the mean of its divisors is an integer number (6364990).

Almost surely, 2^12729979 is an apocalyptic number.

12729979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12729979 is an equidigital number, since it uses as much as digits as its factorization.

12729979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142884, while the sum is 46.

The square root of 12729979 is about 3567.9096120838. The cubic root of 12729979 is about 233.4940917121.

The spelling of 12729979 in words is "twelve million, seven hundred twenty-nine thousand, nine hundred seventy-nine".