397517948083951 has 2 divisors, whose sum is σ = 397517948083952. Its totient is φ = 397517948083950.

The previous prime is 397517948083943. The next prime is 397517948083961. The reversal of 397517948083951 is 159380849715793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397517948083951 - 2³ = 397517948083943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397517948083961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198758974041975 + 198758974041976.

It is an arithmetic number, because the mean of its divisors is an integer number (198758974041976).

Almost surely, 2^{397517948083951} is an apocalyptic number.

397517948083951 is a deficient number, since it is larger than the sum of its proper divisors (1).

397517948083951 is an equidigital number, since it uses as much as digits as its factorization.

397517948083951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2057529600, while the sum is 79.

The spelling of 397517948083951 in words is "three hundred ninety-seven trillion, five hundred seventeen billion, nine hundred forty-eight million, eighty-three thousand, nine hundred fifty-one".