977231317 has 2 divisors, whose sum is σ = 977231318. Its totient is φ = 977231316.

The previous prime is 977231273. The next prime is 977231327. The reversal of 977231317 is 713132779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 973065636 + 4165681 = 31194^2 + 2041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-977231317 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 977231317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (977231327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488615658 + 488615659.

It is an arithmetic number, because the mean of its divisors is an integer number (488615659).

Almost surely, 2^977231317 is an apocalyptic number.

It is an amenable number.

977231317 is a deficient number, since it is larger than the sum of its proper divisors (1).

977231317 is an equidigital number, since it uses as much as digits as its factorization.

977231317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55566, while the sum is 40.

The square root of 977231317 is about 31260.6992404201. The cubic root of 977231317 is about 992.3520977001.

The spelling of 977231317 in words is "nine hundred seventy-seven million, two hundred thirty-one thousand, three hundred seventeen".