397063681 has 8 divisors (see below), whose sum is σ = 453936960. Its totient is φ = 340227888.

The previous prime is 397063657. The next prime is 397063699. The reversal of 397063681 is 186360793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 397063681 - 2⁵ = 397063649 is a prime.

It is a super-2 number, since 2×397063681² = 315319133538539522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397063081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19110 + ... + 34048.

It is an arithmetic number, because the mean of its divisors is an integer number (56742120).

Almost surely, 2^397063681 is an apocalyptic number.

It is an amenable number.

397063681 is a deficient number, since it is larger than the sum of its proper divisors (56873279).

397063681 is a wasteful number, since it uses less digits than its factorization.

397063681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18743.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 397063681 is about 19926.4568099800. The cubic root of 397063681 is about 734.9989547550.

The spelling of 397063681 in words is "three hundred ninety-seven million, sixty-three thousand, six hundred eighty-one".