724789 has 8 divisors (see below), whose sum is σ = 788480. Its totient is φ = 662256.

The previous prime is 724783. The next prime is 724807. The reversal of 724789 is 987427.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 724789 - 2³ = 724781 is a prime.

It is a Duffinian number.

724789 is a lucky number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724781) 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, 1432 + ... + 1870.

It is an arithmetic number, because the mean of its divisors is an integer number (98560).

2⁷²⁴⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

724789 is a deficient number, since it is larger than the sum of its proper divisors (63691).

724789 is a wasteful number, since it uses less digits than its factorization.

724789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579.

The product of its digits is 28224, while the sum is 37.

The square root of 724789 is about 851.3454058136. The cubic root of 724789 is about 89.8263730753.

The spelling of 724789 in words is "seven hundred twenty-four thousand, seven hundred eighty-nine".