397959 has 8 divisors (see below), whose sum is σ = 535920. Its totient is φ = 262656.

The previous prime is 397951. The next prime is 397963. The reversal of 397959 is 959793.

It is a happy number.

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

It is not a de Polignac number, because 397959 - 2³ = 397951 is a prime.

397959 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 397959.

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 397959.

It is not an unprimeable number, because it can be changed into a prime (397951) 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, 282 + ... + 935.

It is an arithmetic number, because the mean of its divisors is an integer number (66990).

2³⁹⁷⁹⁵⁹ is an apocalyptic number.

397959 is a deficient number, since it is larger than the sum of its proper divisors (137961).

397959 is a wasteful number, since it uses less digits than its factorization.

397959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329.

The product of its digits is 76545, while the sum is 42.

The square root of 397959 is about 630.8399163021. The cubic root of 397959 is about 73.5550977492. Note that the first 3 decimals are identical.

The spelling of 397959 in words is "three hundred ninety-seven thousand, nine hundred fifty-nine".