8398079957 has 2 divisors, whose sum is σ = 8398079958. Its totient is φ = 8398079956.

The previous prime is 8398079947. The next prime is 8398080013. The reversal of 8398079957 is 7599708938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7732388356 + 665691601 = 87934^2 + 25801^2 .

It is a cyclic number.

It is not a de Polignac number, because 8398079957 - 2⁴ = 8398079941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8398079893 and 8398079902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8398079947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4199039978 + 4199039979.

It is an arithmetic number, because the mean of its divisors is an integer number (4199039979).

Almost surely, 2^8398079957 is an apocalyptic number.

It is an amenable number.

8398079957 is a deficient number, since it is larger than the sum of its proper divisors (1).

8398079957 is an equidigital number, since it uses as much as digits as its factorization.

8398079957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34292160, while the sum is 65.

The square root of 8398079957 is about 91641.0386071655. The cubic root of 8398079957 is about 2032.6378189138.

The spelling of 8398079957 in words is "eight billion, three hundred ninety-eight million, seventy-nine thousand, nine hundred fifty-seven".