397871047931 has 16 divisors (see below), whose sum is σ = 457484280000. Its totient is φ = 338952705408.

The previous prime is 397871047771. The next prime is 397871047933. The reversal of 397871047931 is 139740178793.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 397871047931 - 2²² = 397866853627 is a prime.

It is a super-2 number, since 2×397871047931² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397871047933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3859445 + ... + 3961193.

It is an arithmetic number, because the mean of its divisors is an integer number (28592767500).

Almost surely, 2^397871047931 is an apocalyptic number.

397871047931 is a deficient number, since it is larger than the sum of its proper divisors (59613232069).

397871047931 is a wasteful number, since it uses less digits than its factorization.

397871047931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105158.

The product of its (nonzero) digits is 8001504, while the sum is 59.

The spelling of 397871047931 in words is "three hundred ninety-seven billion, eight hundred seventy-one million, forty-seven thousand, nine hundred thirty-one".