631673 has 4 divisors (see below), whose sum is σ = 721920. Its totient is φ = 541428.

The previous prime is 631667. The next prime is 631679. The reversal of 631673 is 376136.

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 an interprime number because it is at equal distance from previous prime (631667) and next prime (631679).

It is a cyclic number.

It is not a de Polignac number, because 631673 - 2¹⁴ = 615289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (631679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45113 + ... + 45126.

It is an arithmetic number, because the mean of its divisors is an integer number (180480).

2⁶³¹⁶⁷³ is an apocalyptic number.

It is an amenable number.

631673 is a deficient number, since it is larger than the sum of its proper divisors (90247).

631673 is an equidigital number, since it uses as much as digits as its factorization.

631673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90246.

The product of its digits is 2268, while the sum is 26.

The square root of 631673 is about 794.7785855193. The cubic root of 631673 is about 85.8020053034.

The spelling of 631673 in words is "six hundred thirty-one thousand, six hundred seventy-three".