724889 has 4 divisors (see below), whose sum is σ = 790800. Its totient is φ = 658980.

The previous prime is 724879. The next prime is 724901. The reversal of 724889 is 988427.

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 724889 - 2¹² = 720793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (724879) 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 3 ways as a sum of consecutive naturals, for example, 32939 + ... + 32960.

It is an arithmetic number, because the mean of its divisors is an integer number (197700).

2⁷²⁴⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

724889 is a deficient number, since it is larger than the sum of its proper divisors (65911).

724889 is a wasteful number, since it uses less digits than its factorization.

724889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65910.

The product of its digits is 32256, while the sum is 38.

The square root of 724889 is about 851.4041343569. The cubic root of 724889 is about 89.8305040359.

It can be divided in two parts, 7248 and 89, that added together give a palindrome (7337).

The spelling of 724889 in words is "seven hundred twenty-four thousand, eight hundred eighty-nine".