397800631 has 2 divisors, whose sum is σ = 397800632. Its totient is φ = 397800630.

The previous prime is 397800619. The next prime is 397800643. The reversal of 397800631 is 136008793.

It is a balanced prime because it is at equal distance from previous prime (397800619) and next prime (397800643).

It is a cyclic number.

It is not a de Polignac number, because 397800631 - 2⁷ = 397800503 is a prime.

It is a super-2 number, since 2×397800631² = 316490684047996322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397800691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198900315 + 198900316.

It is an arithmetic number, because the mean of its divisors is an integer number (198900316).

Almost surely, 2^397800631 is an apocalyptic number.

397800631 is a deficient number, since it is larger than the sum of its proper divisors (1).

397800631 is an equidigital number, since it uses as much as digits as its factorization.

397800631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 397800631 is about 19944.9399848683. The cubic root of 397800631 is about 735.4533929601.

The spelling of 397800631 in words is "three hundred ninety-seven million, eight hundred thousand, six hundred thirty-one".