397552427137 has 2 divisors, whose sum is σ = 397552427138. Its totient is φ = 397552427136.

The previous prime is 397552427093. The next prime is 397552427149. The reversal of 397552427137 is 731724255793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397516379121 + 36048016 = 630489^2 + 6004^2 .

It is an emirp because it is prime and its reverse (731724255793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 397552427137 - 2¹¹ = 397552425089 is a prime.

It is not a weakly prime, because it can be changed into another prime (397552428137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198776213568 + 198776213569.

It is an arithmetic number, because the mean of its divisors is an integer number (198776213569).

Almost surely, 2^397552427137 is an apocalyptic number.

It is an amenable number.

397552427137 is a deficient number, since it is larger than the sum of its proper divisors (1).

397552427137 is an equidigital number, since it uses as much as digits as its factorization.

397552427137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11113200, while the sum is 55.

The spelling of 397552427137 in words is "three hundred ninety-seven billion, five hundred fifty-two million, four hundred twenty-seven thousand, one hundred thirty-seven".