397703081 has 2 divisors, whose sum is σ = 397703082. Its totient is φ = 397703080.

The previous prime is 397702979. The next prime is 397703093. The reversal of 397703081 is 180307793.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246019225 + 151683856 = 15685^2 + 12316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397703081 is a prime.

It is a super-2 number, since 2×397703081² = 316335481273785122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (397703981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198851540 + 198851541.

It is an arithmetic number, because the mean of its divisors is an integer number (198851541).

Almost surely, 2^397703081 is an apocalyptic number.

It is an amenable number.

397703081 is a deficient number, since it is larger than the sum of its proper divisors (1).

397703081 is an equidigital number, since it uses as much as digits as its factorization.

397703081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 397703081 is about 19942.4943525127. The cubic root of 397703081 is about 735.3932712659.

The spelling of 397703081 in words is "three hundred ninety-seven million, seven hundred three thousand, eighty-one".