722389 has 2 divisors, whose sum is σ = 722390. Its totient is φ = 722388.

The previous prime is 722377. The next prime is 722411. The reversal of 722389 is 983227.

722389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 688900 + 33489 = 830^2 + 183^2 .

It is a cyclic number.

It is not a de Polignac number, because 722389 - 2¹⁵ = 689621 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 722389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361194 + 361195.

It is an arithmetic number, because the mean of its divisors is an integer number (361195).

2⁷²²³⁸⁹ is an apocalyptic number.

It is an amenable number.

722389 is a deficient number, since it is larger than the sum of its proper divisors (1).

722389 is an equidigital number, since it uses as much as digits as its factorization.

722389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 722389 is about 849.9347033743. The cubic root of 722389 is about 89.7271158256.

It can be divided in two parts, 722 and 389, that added together give a palindrome (1111).

The spelling of 722389 in words is "seven hundred twenty-two thousand, three hundred eighty-nine".