56979649 has 2 divisors, whose sum is σ = 56979650. Its totient is φ = 56979648.

The previous prime is 56979607. The next prime is 56979653. The reversal of 56979649 is 94697965.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33872400 + 23107249 = 5820^2 + 4807^2 .

It is a cyclic number.

It is not a de Polignac number, because 56979649 - 2⁷ = 56979521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56979649.

It is not a weakly prime, because it can be changed into another prime (56979679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28489824 + 28489825.

It is an arithmetic number, because the mean of its divisors is an integer number (28489825).

Almost surely, 2^56979649 is an apocalyptic number.

It is an amenable number.

56979649 is a deficient number, since it is larger than the sum of its proper divisors (1).

56979649 is an equidigital number, since it uses as much as digits as its factorization.

56979649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 55.

The square root of 56979649 is about 7548.4865370483. The cubic root of 56979649 is about 384.8043060110.

The spelling of 56979649 in words is "fifty-six million, nine hundred seventy-nine thousand, six hundred forty-nine".