631198 has 4 divisors (see below), whose sum is σ = 946800. Its totient is φ = 315598.

The previous prime is 631187. The next prime is 631223. The reversal of 631198 is 891136.

It is a happy number.

631198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157798 + ... + 157801.

It is an arithmetic number, because the mean of its divisors is an integer number (236700).

2⁶³¹¹⁹⁸ is an apocalyptic number.

631198 is a deficient number, since it is larger than the sum of its proper divisors (315602).

631198 is a wasteful number, since it uses less digits than its factorization.

631198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315601.

The product of its digits is 1296, while the sum is 28.

The square root of 631198 is about 794.4797039573. The cubic root of 631198 is about 85.7804930270.

The spelling of 631198 in words is "six hundred thirty-one thousand, one hundred ninety-eight".