631798 has 4 divisors (see below), whose sum is σ = 947700. Its totient is φ = 315898.

The previous prime is 631789. The next prime is 631817. The reversal of 631798 is 897136.

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

It is a congruent number.

It is an unprimeable number.

631798 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157948 + ... + 157951.

It is an arithmetic number, because the mean of its divisors is an integer number (236925).

2⁶³¹⁷⁹⁸ is an apocalyptic number.

631798 is a deficient number, since it is larger than the sum of its proper divisors (315902).

631798 is a wasteful number, since it uses less digits than its factorization.

631798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315901.

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

The square root of 631798 is about 794.8572198829. The cubic root of 631798 is about 85.8076646362.

The spelling of 631798 in words is "six hundred thirty-one thousand, seven hundred ninety-eight".