490631 has 2 divisors, whose sum is σ = 490632. Its totient is φ = 490630.

The previous prime is 490627. The next prime is 490643. The reversal of 490631 is 136094.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 490631 - 2² = 490627 is a prime.

It is a super-2 number, since 2×490631² = 481437556322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 490597 and 490606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (490661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245315 + 245316.

It is an arithmetic number, because the mean of its divisors is an integer number (245316).

2⁴⁹⁰⁶³¹ is an apocalyptic number.

490631 is a deficient number, since it is larger than the sum of its proper divisors (1).

490631 is an equidigital number, since it uses as much as digits as its factorization.

490631 is an evil number, because the sum of its binary digits is even.

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

The square root of 490631 is about 700.4505692767. The cubic root of 490631 is about 78.8711781824.

The spelling of 490631 in words is "four hundred ninety thousand, six hundred thirty-one".