12998977 has 2 divisors, whose sum is σ = 12998978. Its totient is φ = 12998976.

The previous prime is 12998969. The next prime is 12998981. The reversal of 12998977 is 77989921.

12998977 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 can be written as a sum of positive squares in only one way, i.e., 12609601 + 389376 = 3551^2 + 624^2 .

It is an emirp because it is prime and its reverse (77989921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12998977 - 2³ = 12998969 is a prime.

It is not a weakly prime, because it can be changed into another prime (12998957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6499488 + 6499489.

It is an arithmetic number, because the mean of its divisors is an integer number (6499489).

Almost surely, 2^12998977 is an apocalyptic number.

It is an amenable number.

12998977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12998977 is an equidigital number, since it uses as much as digits as its factorization.

12998977 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 12998977 is about 3605.4094080978. The cubic root of 12998977 is about 235.1273008785.

The spelling of 12998977 in words is "twelve million, nine hundred ninety-eight thousand, nine hundred seventy-seven".