631490 has 8 divisors (see below), whose sum is σ = 1136700. Its totient is φ = 252592.

The previous prime is 631487. The next prime is 631507. The reversal of 631490 is 94136.

It can be written as a sum of positive squares in 2 ways, for example, as 606841 + 24649 = 779^2 + 157^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 631490.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31565 + ... + 31584.

2⁶³¹⁴⁹⁰ is an apocalyptic number.

631490 is a deficient number, since it is larger than the sum of its proper divisors (505210).

631490 is a wasteful number, since it uses less digits than its factorization.

631490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63156.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 631490 is about 794.6634507765. The cubic root of 631490 is about 85.7937186933.

The spelling of 631490 in words is "six hundred thirty-one thousand, four hundred ninety".