722489 has 2 divisors, whose sum is σ = 722490. Its totient is φ = 722488.

The previous prime is 722479. The next prime is 722509. The reversal of 722489 is 984227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 714025 + 8464 = 845^2 + 92^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361244 + 361245.

It is an arithmetic number, because the mean of its divisors is an integer number (361245).

2⁷²²⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

722489 is a deficient number, since it is larger than the sum of its proper divisors (1).

722489 is an equidigital number, since it uses as much as digits as its factorization.

722489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 722489 is about 849.9935293871. The cubic root of 722489 is about 89.7312559300.

The spelling of 722489 in words is "seven hundred twenty-two thousand, four hundred eighty-nine".