12657977 has 2 divisors, whose sum is σ = 12657978. Its totient is φ = 12657976.

The previous prime is 12657973. The next prime is 12657991. The reversal of 12657977 is 77975621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8231161 + 4426816 = 2869^2 + 2104^2 .

It is a cyclic number.

It is not a de Polignac number, because 12657977 - 2² = 12657973 is a prime.

It is not a weakly prime, because it can be changed into another prime (12657973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6328988 + 6328989.

It is an arithmetic number, because the mean of its divisors is an integer number (6328989).

Almost surely, 2^12657977 is an apocalyptic number.

It is an amenable number.

12657977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12657977 is an equidigital number, since it uses as much as digits as its factorization.

12657977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185220, while the sum is 44.

The square root of 12657977 is about 3557.8050817885. The cubic root of 12657977 is about 233.0530373470.

The spelling of 12657977 in words is "twelve million, six hundred fifty-seven thousand, nine hundred seventy-seven".