397217 has 2 divisors, whose sum is σ = 397218. Its totient is φ = 397216.

The previous prime is 397211. The next prime is 397223. The reversal of 397217 is 712793.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (397211) and next prime (397223).

It can be written as a sum of positive squares in only one way, i.e., 358801 + 38416 = 599^2 + 196^2 .

It is a cyclic number.

It is not a de Polignac number, because 397217 - 2⁶ = 397153 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397217.

It is not a weakly prime, because it can be changed into another prime (397211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198608 + 198609.

It is an arithmetic number, because the mean of its divisors is an integer number (198609).

2³⁹⁷²¹⁷ is an apocalyptic number.

It is an amenable number.

397217 is a deficient number, since it is larger than the sum of its proper divisors (1).

397217 is an equidigital number, since it uses as much as digits as its factorization.

397217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646, while the sum is 29.

The square root of 397217 is about 630.2515370866. The cubic root of 397217 is about 73.5093544791.

The spelling of 397217 in words is "three hundred ninety-seven thousand, two hundred seventeen".