723589 has 2 divisors, whose sum is σ = 723590. Its totient is φ = 723588.

The previous prime is 723587. The next prime is 723601. The reversal of 723589 is 985327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 722500 + 1089 = 850^2 + 33^2 .

It is a cyclic number.

It is not a de Polignac number, because 723589 - 2¹ = 723587 is a prime.

Together with 723587, it forms a pair of twin primes.

723589 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361794 + 361795.

It is an arithmetic number, because the mean of its divisors is an integer number (361795).

2⁷²³⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

723589 is a deficient number, since it is larger than the sum of its proper divisors (1).

723589 is an equidigital number, since it uses as much as digits as its factorization.

723589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 34.

The square root of 723589 is about 850.6403470328. The cubic root of 723589 is about 89.7767718852.

The spelling of 723589 in words is "seven hundred twenty-three thousand, five hundred eighty-nine".