397016231 has 2 divisors, whose sum is σ = 397016232. Its totient is φ = 397016230.

The previous prime is 397016227. The next prime is 397016299. The reversal of 397016231 is 132610793.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397016231 - 2² = 397016227 is a prime.

It is a super-2 number, since 2×397016231² = 315243775354890722, which contains 22 as substring.

It is a Chen prime.

It is equal to p_21185483 and since 397016231 and 21185483 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397016201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198508115 + 198508116.

It is an arithmetic number, because the mean of its divisors is an integer number (198508116).

Almost surely, 2^397016231 is an apocalyptic number.

397016231 is a deficient number, since it is larger than the sum of its proper divisors (1).

397016231 is an equidigital number, since it uses as much as digits as its factorization.

397016231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 397016231 is about 19925.2661462777. The cubic root of 397016231 is about 734.9696755811.

The spelling of 397016231 in words is "three hundred ninety-seven million, sixteen thousand, two hundred thirty-one".