397539274943 has 2 divisors, whose sum is σ = 397539274944. Its totient is φ = 397539274942.

The previous prime is 397539274939. The next prime is 397539274987. The reversal of 397539274943 is 349472935793.

It is a weak prime.

It is an emirp because it is prime and its reverse (349472935793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 397539274943 - 2² = 397539274939 is a prime.

It is a super-2 number, since 2×397539274943² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397539274943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397539274343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198769637471 + 198769637472.

It is an arithmetic number, because the mean of its divisors is an integer number (198769637472).

Almost surely, 2^397539274943 is an apocalyptic number.

397539274943 is a deficient number, since it is larger than the sum of its proper divisors (1).

397539274943 is an equidigital number, since it uses as much as digits as its factorization.

397539274943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 154314720, while the sum is 65.

The spelling of 397539274943 in words is "three hundred ninety-seven billion, five hundred thirty-nine million, two hundred seventy-four thousand, nine hundred forty-three".