672631 has 4 divisors (see below), whose sum is σ = 675664. Its totient is φ = 669600.

The previous prime is 672629. The next prime is 672641. The reversal of 672631 is 136276.

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 672631 - 2¹ = 672629 is a prime.

It is a super-2 number, since 2×672631² = 904864924322, which contains 22 as substring.

It is a Duffinian number.

672631 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 672596 and 672605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672641) 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, 1155 + ... + 1636.

It is an arithmetic number, because the mean of its divisors is an integer number (168916).

2⁶⁷²⁶³¹ is an apocalyptic number.

672631 is a deficient number, since it is larger than the sum of its proper divisors (3033).

672631 is a wasteful number, since it uses less digits than its factorization.

672631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032.

The product of its digits is 1512, while the sum is 25.

The square root of 672631 is about 820.1408415632. The cubic root of 672631 is about 87.6177896635.

The spelling of 672631 in words is "six hundred seventy-two thousand, six hundred thirty-one".