397817 has 8 divisors (see below), whose sum is σ = 481536. Its totient is φ = 320832.

The previous prime is 397811. The next prime is 397829. The reversal of 397817 is 718793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 397817 - 2⁶ = 397753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1553 + ... + 1790.

It is an arithmetic number, because the mean of its divisors is an integer number (60192).

2³⁹⁷⁸¹⁷ is an apocalyptic number.

It is an amenable number.

397817 is a deficient number, since it is larger than the sum of its proper divisors (83719).

397817 is a wasteful number, since it uses less digits than its factorization.

397817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367.

The product of its digits is 10584, while the sum is 35.

The square root of 397817 is about 630.7273578972. The cubic root of 397817 is about 73.5463480485.

The spelling of 397817 in words is "three hundred ninety-seven thousand, eight hundred seventeen".