397431 has 6 divisors (see below), whose sum is σ = 574080. Its totient is φ = 264948.

The previous prime is 397429. The next prime is 397433. The reversal of 397431 is 134793.

It is an interprime number because it is at equal distance from previous prime (397429) and next prime (397433).

It is not a de Polignac number, because 397431 - 2¹ = 397429 is a prime.

It is a super-2 number, since 2×397431² = 315902799522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 397395 and 397404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22071 + ... + 22088.

It is an arithmetic number, because the mean of its divisors is an integer number (95680).

2³⁹⁷⁴³¹ is an apocalyptic number.

397431 is a deficient number, since it is larger than the sum of its proper divisors (176649).

397431 is a wasteful number, since it uses less digits than its factorization.

397431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44165 (or 44162 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 397431 is about 630.4212877116. The cubic root of 397431 is about 73.5225531234.

It can be divided in two parts, 3974 and 31, that added together give a triangular number (4005 = T₈₉).

The spelling of 397431 in words is "three hundred ninety-seven thousand, four hundred thirty-one".