12945979 has 2 divisors, whose sum is σ = 12945980. Its totient is φ = 12945978.

The previous prime is 12945971. The next prime is 12945983. The reversal of 12945979 is 97954921.

It is a happy number.

12945979 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12945979 - 2³ = 12945971 is a prime.

It is not a weakly prime, because it can be changed into another prime (12945971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6472989 + 6472990.

It is an arithmetic number, because the mean of its divisors is an integer number (6472990).

Almost surely, 2^12945979 is an apocalyptic number.

12945979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12945979 is an equidigital number, since it uses as much as digits as its factorization.

12945979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 46.

The square root of 12945979 is about 3598.0521119072. The cubic root of 12945979 is about 234.8073205600.

It can be divided in two parts, 12945 and 979, that added together give a square (13924 = 118²).

The spelling of 12945979 in words is "twelve million, nine hundred forty-five thousand, nine hundred seventy-nine".