397697 has 2 divisors, whose sum is σ = 397698. Its totient is φ = 397696.

The previous prime is 397687. The next prime is 397721. The reversal of 397697 is 796793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295936 + 101761 = 544^2 + 319^2 .

It is a cyclic number.

It is not a de Polignac number, because 397697 - 2⁶ = 397633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (397687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198848 + 198849.

It is an arithmetic number, because the mean of its divisors is an integer number (198849).

2³⁹⁷⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

397697 is a deficient number, since it is larger than the sum of its proper divisors (1).

397697 is an equidigital number, since it uses as much as digits as its factorization.

397697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442, while the sum is 41.

The square root of 397697 is about 630.6322224562. The cubic root of 397697 is about 73.5389523119.

The spelling of 397697 in words is "three hundred ninety-seven thousand, six hundred ninety-seven".