723839 has 2 divisors, whose sum is σ = 723840. Its totient is φ = 723838.

The previous prime is 723829. The next prime is 723851. The reversal of 723839 is 938327.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 723839 - 2⁴ = 723823 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361919 + 361920.

It is an arithmetic number, because the mean of its divisors is an integer number (361920).

2⁷²³⁸³⁹ is an apocalyptic number.

723839 is a deficient number, since it is larger than the sum of its proper divisors (1).

723839 is an equidigital number, since it uses as much as digits as its factorization.

723839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 723839 is about 850.7872824625. The cubic root of 723839 is about 89.7871099863.

It can be divided in two parts, 7238 and 39, that multiplied together give a palindrome (282282).

The spelling of 723839 in words is "seven hundred twenty-three thousand, eight hundred thirty-nine".