397841505148537 has 2 divisors, whose sum is σ = 397841505148538. Its totient is φ = 397841505148536.

The previous prime is 397841505148513. The next prime is 397841505148543. The reversal of 397841505148537 is 735841505148793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226433997580176 + 171407507568361 = 15047724^2 + 13092269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397841505148537 is a prime.

It is not a weakly prime, because it can be changed into another prime (397841505148037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198920752574268 + 198920752574269.

It is an arithmetic number, because the mean of its divisors is an integer number (198920752574269).

Almost surely, 2^{397841505148537} is an apocalyptic number.

It is an amenable number.

397841505148537 is a deficient number, since it is larger than the sum of its proper divisors (1).

397841505148537 is an equidigital number, since it uses as much as digits as its factorization.

397841505148537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032000, while the sum is 70.

The spelling of 397841505148537 in words is "three hundred ninety-seven trillion, eight hundred forty-one billion, five hundred five million, one hundred forty-eight thousand, five hundred thirty-seven".