977565601 has 2 divisors, whose sum is σ = 977565602. Its totient is φ = 977565600.

The previous prime is 977565581. The next prime is 977565661. The reversal of 977565601 is 106565779.

It is a happy number.

977565601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 657871201 + 319694400 = 25649^2 + 17880^2 .

It is a cyclic number.

It is not a de Polignac number, because 977565601 - 2⁷ = 977565473 is a prime.

It is not a weakly prime, because it can be changed into another prime (977565661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488782800 + 488782801.

It is an arithmetic number, because the mean of its divisors is an integer number (488782801).

Almost surely, 2^977565601 is an apocalyptic number.

It is an amenable number.

977565601 is a deficient number, since it is larger than the sum of its proper divisors (1).

977565601 is an equidigital number, since it uses as much as digits as its factorization.

977565601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 396900, while the sum is 46.

The square root of 977565601 is about 31266.0454966726. The cubic root of 977565601 is about 992.4652369351.

The spelling of 977565601 in words is "nine hundred seventy-seven million, five hundred sixty-five thousand, six hundred one".