631897 has 4 divisors (see below), whose sum is σ = 722176. Its totient is φ = 541620.

The previous prime is 631889. The next prime is 631901. The reversal of 631897 is 798136.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 631897 - 2³ = 631889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631817) 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, 45129 + ... + 45142.

It is an arithmetic number, because the mean of its divisors is an integer number (180544).

2⁶³¹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

631897 is a deficient number, since it is larger than the sum of its proper divisors (90279).

631897 is an equidigital number, since it uses as much as digits as its factorization.

631897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90278.

The product of its digits is 9072, while the sum is 34.

The square root of 631897 is about 794.9194927790. The cubic root of 631897 is about 85.8121462982.

The spelling of 631897 in words is "six hundred thirty-one thousand, eight hundred ninety-seven".