12656977 has 4 divisors (see below), whose sum is σ = 12664996. Its totient is φ = 12648960.

The previous prime is 12656939. The next prime is 12657011. The reversal of 12656977 is 77965621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10297681 + 2359296 = 3209^2 + 1536^2 .

It is a cyclic number.

It is not a de Polignac number, because 12656977 - 2¹⁹ = 12132689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12656927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768 + ... + 5089.

It is an arithmetic number, because the mean of its divisors is an integer number (3166249).

Almost surely, 2^12656977 is an apocalyptic number.

It is an amenable number.

12656977 is a deficient number, since it is larger than the sum of its proper divisors (8019).

12656977 is an equidigital number, since it uses as much as digits as its factorization.

12656977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8018.

The product of its digits is 158760, while the sum is 43.

The square root of 12656977 is about 3557.6645429270. The cubic root of 12656977 is about 233.0469000004.

The spelling of 12656977 in words is "twelve million, six hundred fifty-six thousand, nine hundred seventy-seven".