8396972977 has 2 divisors, whose sum is σ = 8396972978. Its totient is φ = 8396972976.

The previous prime is 8396972957. The next prime is 8396972989. The reversal of 8396972977 is 7792796938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7067933041 + 1329039936 = 84071^2 + 36456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8396972977 is a prime.

It is not a weakly prime, because it can be changed into another prime (8396972957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4198486488 + 4198486489.

It is an arithmetic number, because the mean of its divisors is an integer number (4198486489).

Almost surely, 2^8396972977 is an apocalyptic number.

It is an amenable number.

8396972977 is a deficient number, since it is larger than the sum of its proper divisors (1).

8396972977 is an equidigital number, since it uses as much as digits as its factorization.

8396972977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72013536, while the sum is 67.

The square root of 8396972977 is about 91634.9986468053. The cubic root of 8396972977 is about 2032.5485053130.

The spelling of 8396972977 in words is "eight billion, three hundred ninety-six million, nine hundred seventy-two thousand, nine hundred seventy-seven".