397231 has 4 divisors (see below), whose sum is σ = 399832. Its totient is φ = 394632.

The previous prime is 397223. The next prime is 397237. The reversal of 397231 is 132793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 397231 - 2³ = 397223 is a prime.

It is a super-2 number, since 2×397231² = 315584934722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397196 and 397205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056 + ... + 1381.

It is an arithmetic number, because the mean of its divisors is an integer number (99958).

2³⁹⁷²³¹ is an apocalyptic number.

397231 is a deficient number, since it is larger than the sum of its proper divisors (2601).

397231 is a wasteful number, since it uses less digits than its factorization.

397231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2600.

The product of its digits is 1134, while the sum is 25.

The square root of 397231 is about 630.2626436653. The cubic root of 397231 is about 73.5102180867.

The spelling of 397231 in words is "three hundred ninety-seven thousand, two hundred thirty-one".