731943 has 8 divisors (see below), whose sum is σ = 1084400. Its totient is φ = 487944.

The previous prime is 731933. The next prime is 731957. The reversal of 731943 is 349137.

It is not a de Polignac number, because 731943 - 2⁵ = 731911 is a prime.

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: 27109 = 731943 / (7 + 3 + 1 + 9 + 4 + 3).

It is a Duffinian number.

731943 is a lucky number.

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 731943.

It is not an unprimeable number, because it can be changed into a prime (731923) 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 7 ways as a sum of consecutive naturals, for example, 13528 + ... + 13581.

It is an arithmetic number, because the mean of its divisors is an integer number (135550).

2⁷³¹⁹⁴³ is an apocalyptic number.

731943 is a deficient number, since it is larger than the sum of its proper divisors (352457).

731943 is a wasteful number, since it uses less digits than its factorization.

731943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27118 (or 27112 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 731943 is about 855.5366736733. The cubic root of 731943 is about 90.1209484990.

It can be divided in two parts, 73 and 1943, that added together give a triangular number (2016 = T₆₃).

The spelling of 731943 in words is "seven hundred thirty-one thousand, nine hundred forty-three".