397297975313 has 2 divisors, whose sum is σ = 397297975314. Its totient is φ = 397297975312.

The previous prime is 397297975247. The next prime is 397297975369. The reversal of 397297975313 is 313579792793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279393644929 + 117904330384 = 528577^2 + 343372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397297975313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397297975313.

It is not a weakly prime, because it can be changed into another prime (397297975513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198648987656 + 198648987657.

It is an arithmetic number, because the mean of its divisors is an integer number (198648987657).

Almost surely, 2^397297975313 is an apocalyptic number.

It is an amenable number.

397297975313 is a deficient number, since it is larger than the sum of its proper divisors (1).

397297975313 is an equidigital number, since it uses as much as digits as its factorization.

397297975313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67512690, while the sum is 65.

The spelling of 397297975313 in words is "three hundred ninety-seven billion, two hundred ninety-seven million, nine hundred seventy-five thousand, three hundred thirteen".