8979947377 has 2 divisors, whose sum is σ = 8979947378. Its totient is φ = 8979947376.

The previous prime is 8979947341. The next prime is 8979947423. The reversal of 8979947377 is 7737499798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8740193121 + 239754256 = 93489^2 + 15484^2 .

It is a cyclic number.

It is not a de Polignac number, because 8979947377 - 2¹⁵ = 8979914609 is a prime.

It is not a weakly prime, because it can be changed into another prime (8979944377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4489973688 + 4489973689.

It is an arithmetic number, because the mean of its divisors is an integer number (4489973689).

Almost surely, 2^8979947377 is an apocalyptic number.

It is an amenable number.

8979947377 is a deficient number, since it is larger than the sum of its proper divisors (1).

8979947377 is an equidigital number, since it uses as much as digits as its factorization.

8979947377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168031584, while the sum is 70.

The square root of 8979947377 is about 94762.5842672096. The cubic root of 8979947377 is about 2078.5378173649.

The spelling of 8979947377 in words is "eight billion, nine hundred seventy-nine million, nine hundred forty-seven thousand, three hundred seventy-seven".