12901979 has 2 divisors, whose sum is σ = 12901980. Its totient is φ = 12901978.

The previous prime is 12901961. The next prime is 12901981. The reversal of 12901979 is 97910921.

12901979 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12901979 is a prime.

It is a super-2 number, since 2×12901979² = 332922124232882, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 12901981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12901279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6450989 + 6450990.

It is an arithmetic number, because the mean of its divisors is an integer number (6450990).

Almost surely, 2^12901979 is an apocalyptic number.

12901979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12901979 is an equidigital number, since it uses as much as digits as its factorization.

12901979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 12901979 is about 3591.9324882297. The cubic root of 12901979 is about 234.5410023729.

The spelling of 12901979 in words is "twelve million, nine hundred one thousand, nine hundred seventy-nine".