8396972957 has 2 divisors, whose sum is σ = 8396972958. Its totient is φ = 8396972956.

The previous prime is 8396972933. The next prime is 8396972977. The reversal of 8396972957 is 7592796938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8145243001 + 251729956 = 90251^2 + 15866^2 .

It is a cyclic number.

It is not a de Polignac number, because 8396972957 - 2¹² = 8396968861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8396972893 and 8396972902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8396972977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4198486478 + 4198486479.

It is an arithmetic number, because the mean of its divisors is an integer number (4198486479).

Almost surely, 2^8396972957 is an apocalyptic number.

It is an amenable number.

8396972957 is a deficient number, since it is larger than the sum of its proper divisors (1).

8396972957 is an equidigital number, since it uses as much as digits as its factorization.

8396972957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51438240, while the sum is 65.

The square root of 8396972957 is about 91634.9985376766. The cubic root of 8396972957 is about 2032.5485036993.

It can be divided in two parts, 839 and 6972957, that added together give a palindrome (6973796).

The spelling of 8396972957 in words is "eight billion, three hundred ninety-six million, nine hundred seventy-two thousand, nine hundred fifty-seven".