397656097 has 2 divisors, whose sum is σ = 397656098. Its totient is φ = 397656096.

The previous prime is 397656041. The next prime is 397656137. The reversal of 397656097 is 790656793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 382632721 + 15023376 = 19561^2 + 3876^2 .

It is an emirp because it is prime and its reverse (790656793) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397656097 is a prime.

It is not a weakly prime, because it can be changed into another prime (397656397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198828048 + 198828049.

It is an arithmetic number, because the mean of its divisors is an integer number (198828049).

Almost surely, 2^397656097 is an apocalyptic number.

It is an amenable number.

397656097 is a deficient number, since it is larger than the sum of its proper divisors (1).

397656097 is an equidigital number, since it uses as much as digits as its factorization.

397656097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2143260, while the sum is 52.

The square root of 397656097 is about 19941.3163306739. The cubic root of 397656097 is about 735.3643107341.

The spelling of 397656097 in words is "three hundred ninety-seven million, six hundred fifty-six thousand, ninety-seven".