12789979 has 2 divisors, whose sum is σ = 12789980. Its totient is φ = 12789978.

The previous prime is 12789977. The next prime is 12790007. The reversal of 12789979 is 97998721.

12789979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12789979 - 2¹ = 12789977 is a prime.

Together with 12789977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12789971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6394989 + 6394990.

It is an arithmetic number, because the mean of its divisors is an integer number (6394990).

Almost surely, 2^12789979 is an apocalyptic number.

12789979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12789979 is an equidigital number, since it uses as much as digits as its factorization.

12789979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 52.

The square root of 12789979 is about 3576.3080124620. The cubic root of 12789979 is about 233.8603581576.

The spelling of 12789979 in words is "twelve million, seven hundred eighty-nine thousand, nine hundred seventy-nine".