731489 has 4 divisors (see below), whose sum is σ = 798000. Its totient is φ = 664980.

The previous prime is 731483. The next prime is 731501. The reversal of 731489 is 984137.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 731489 - 2⁸ = 731233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731483) 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, 33239 + ... + 33260.

It is an arithmetic number, because the mean of its divisors is an integer number (199500).

2⁷³¹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

731489 is a deficient number, since it is larger than the sum of its proper divisors (66511).

731489 is a wasteful number, since it uses less digits than its factorization.

731489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66510.

The product of its digits is 6048, while the sum is 32.

The square root of 731489 is about 855.2713019855. The cubic root of 731489 is about 90.1023116320.

The spelling of 731489 in words is "seven hundred thirty-one thousand, four hundred eighty-nine".