297631 has 4 divisors (see below), whose sum is σ = 307264. Its totient is φ = 288000.

The previous prime is 297629. The next prime is 297641. The reversal of 297631 is 136792.

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

It is a 8-Lehmer number, since φ(297631) divides (297631-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 297631 - 2¹ = 297629 is a prime.

It is a super-2 number, since 2×297631² = 177168424322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 297631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (297601) 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, 4770 + ... + 4831.

It is an arithmetic number, because the mean of its divisors is an integer number (76816).

2²⁹⁷⁶³¹ is an apocalyptic number.

297631 is a deficient number, since it is larger than the sum of its proper divisors (9633).

297631 is an equidigital number, since it uses as much as digits as its factorization.

297631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9632.

The product of its digits is 2268, while the sum is 28.

The square root of 297631 is about 545.5556800181. Note that the first 3 decimals coincide. The cubic root of 297631 is about 66.7666195110.

The spelling of 297631 in words is "two hundred ninety-seven thousand, six hundred thirty-one".