731667 has 4 divisors (see below), whose sum is σ = 975560. Its totient is φ = 487776.

The previous prime is 731651. The next prime is 731681. The reversal of 731667 is 766137.

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

It is not a de Polignac number, because 731667 - 2⁴ = 731651 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731267) 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, 121942 + ... + 121947.

It is an arithmetic number, because the mean of its divisors is an integer number (243890).

2⁷³¹⁶⁶⁷ is an apocalyptic number.

731667 is a deficient number, since it is larger than the sum of its proper divisors (243893).

731667 is a wasteful number, since it uses less digits than its factorization.

731667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243892.

The product of its digits is 5292, while the sum is 30.

The square root of 731667 is about 855.3753562033. The cubic root of 731667 is about 90.1096195162.

The spelling of 731667 in words is "seven hundred thirty-one thousand, six hundred sixty-seven".