397135871937 has 72 divisors (see below), whose sum is σ = 672413040000. Its totient is φ = 225197884800.

The previous prime is 397135871933. The next prime is 397135871953. The reversal of 397135871937 is 739178531793.

397135871937 is a `hidden beast` number, since 3 + 9 + 7 + 1 + 3 + 587 + 19 + 37 = 666.

It is not a de Polignac number, because 397135871937 - 2² = 397135871933 is a prime.

It is a super-2 number, since 2×397135871937² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (397135871933) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 79440564 + ... + 79445562.

It is an arithmetic number, because the mean of its divisors is an integer number (9339070000).

Almost surely, 2^397135871937 is an apocalyptic number.

It is an amenable number.

397135871937 is a deficient number, since it is larger than the sum of its proper divisors (275277168063).

397135871937 is a wasteful number, since it uses less digits than its factorization.

397135871937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6363 (or 6353 counting only the distinct ones).

The product of its digits is 30005640, while the sum is 63.

The spelling of 397135871937 in words is "three hundred ninety-seven billion, one hundred thirty-five million, eight hundred seventy-one thousand, nine hundred thirty-seven".