977967761 has 2 divisors, whose sum is σ = 977967762. Its totient is φ = 977967760.

The previous prime is 977967743. The next prime is 977967769. The reversal of 977967761 is 167769779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 976937536 + 1030225 = 31256^2 + 1015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-977967761 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 977967761.

It is not a weakly prime, because it can be changed into another prime (977967769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488983880 + 488983881.

It is an arithmetic number, because the mean of its divisors is an integer number (488983881).

Almost surely, 2^977967761 is an apocalyptic number.

It is an amenable number.

977967761 is a deficient number, since it is larger than the sum of its proper divisors (1).

977967761 is an equidigital number, since it uses as much as digits as its factorization.

977967761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7001316, while the sum is 59.

The square root of 977967761 is about 31272.4760932037. The cubic root of 977967761 is about 992.6013147932.

The spelling of 977967761 in words is "nine hundred seventy-seven million, nine hundred sixty-seven thousand, seven hundred sixty-one".