12644977 has 8 divisors (see below), whose sum is σ = 13001600. Its totient is φ = 12293424.

The previous prime is 12644941. The next prime is 12645011. The reversal of 12644977 is 77944621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12644977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12644077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4099 + ... + 6487.

It is an arithmetic number, because the mean of its divisors is an integer number (1625200).

Almost surely, 2^12644977 is an apocalyptic number.

It is an amenable number.

12644977 is a deficient number, since it is larger than the sum of its proper divisors (356623).

12644977 is an equidigital number, since it uses as much as digits as its factorization.

12644977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2535.

The product of its digits is 84672, while the sum is 40.

The square root of 12644977 is about 3555.9776433493. The cubic root of 12644977 is about 232.9732266141.

It can be divided in two parts, 1264 and 4977, that added together give a square (6241 = 79²).

The spelling of 12644977 in words is "twelve million, six hundred forty-four thousand, nine hundred seventy-seven".