397917 has 24 divisors (see below), whose sum is σ = 655200. Its totient is φ = 230688.

The previous prime is 397907. The next prime is 397921. The reversal of 397917 is 719793.

It is not a de Polignac number, because 397917 - 2¹⁴ = 381533 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 397917.

It is not an unprimeable number, because it can be changed into a prime (397907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2134 + ... + 2312.

It is an arithmetic number, because the mean of its divisors is an integer number (27300).

2³⁹⁷⁹¹⁷ is an apocalyptic number.

It is an amenable number.

397917 is a deficient number, since it is larger than the sum of its proper divisors (257283).

397917 is a wasteful number, since it uses less digits than its factorization.

397917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 214 counting only the distinct ones).

The product of its digits is 11907, while the sum is 36.

The square root of 397917 is about 630.8066264712. The cubic root of 397917 is about 73.5525100264.

The spelling of 397917 in words is "three hundred ninety-seven thousand, nine hundred seventeen".