723489 has 12 divisors (see below), whose sum is σ = 1045296. Its totient is φ = 444912.

The previous prime is 723479. The next prime is 723491. The reversal of 723489 is 984327.

It is not a de Polignac number, because 723489 - 2⁴ = 723473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (723409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207 + ... + 1220.

It is an arithmetic number, because the mean of its divisors is an integer number (87108).

2⁷²³⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

723489 is a deficient number, since it is larger than the sum of its proper divisors (321807).

723489 is a wasteful number, since it uses less digits than its factorization.

723489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456 (or 1443 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 723489 is about 850.5815657537. The cubic root of 723489 is about 89.7726359780.

The spelling of 723489 in words is "seven hundred twenty-three thousand, four hundred eighty-nine".