673631 has 4 divisors (see below), whose sum is σ = 769872. Its totient is φ = 577392.

The previous prime is 673619. The next prime is 673637. The reversal of 673631 is 136376.

673631 = 169² + 170² + ... + 189².

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

It is a cyclic number.

It is not a de Polignac number, because 673631 - 2⁶ = 673567 is a prime.

It is a super-2 number, since 2×673631² = 907557448322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 673631.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 673631.

It is not an unprimeable number, because it can be changed into a prime (673637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48110 + ... + 48123.

It is an arithmetic number, because the mean of its divisors is an integer number (192468).

2⁶⁷³⁶³¹ is an apocalyptic number.

673631 is a deficient number, since it is larger than the sum of its proper divisors (96241).

673631 is an equidigital number, since it uses as much as digits as its factorization.

673631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96240.

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

The square root of 673631 is about 820.7502665245. The cubic root of 673631 is about 87.6611885975.

It can be divided in two parts, 6 and 73631, that added together give a palindrome (73637).

The spelling of 673631 in words is "six hundred seventy-three thousand, six hundred thirty-one".