673731 has 8 divisors (see below), whose sum is σ = 998160. Its totient is φ = 449136.

The previous prime is 673669. The next prime is 673747. The reversal of 673731 is 137376.

673731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 673731 - 2⁶ = 673667 is a prime.

It is a super-2 number, since 2×673731² = 907826920722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 24953 = 673731 / (6 + 7 + 3 + 7 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 673695 and 673704.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 673731.

It is not an unprimeable number, because it can be changed into a prime (673781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12450 + ... + 12503.

It is an arithmetic number, because the mean of its divisors is an integer number (124770).

2⁶⁷³⁷³¹ is an apocalyptic number.

673731 is a deficient number, since it is larger than the sum of its proper divisors (324429).

673731 is a wasteful number, since it uses less digits than its factorization.

673731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24962 (or 24956 counting only the distinct ones).

The product of its digits is 2646, while the sum is 27.

The square root of 673731 is about 820.8111841343. The cubic root of 673731 is about 87.6655261281.

It can be divided in two parts, 6 and 73731, that added together give a palindrome (73737).

The spelling of 673731 in words is "six hundred seventy-three thousand, seven hundred thirty-one".