722189 has 8 divisors (see below), whose sum is σ = 789432. Its totient is φ = 656640.

The previous prime is 722173. The next prime is 722213. The reversal of 722189 is 981227.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13225 + 708964 = 115^2 + 842^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 722189 - 2⁴ = 722173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 722189.

It is not an unprimeable number, because it can be changed into a prime (722119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569 + ... + 1329.

It is an arithmetic number, because the mean of its divisors is an integer number (98679).

2⁷²²¹⁸⁹ is an apocalyptic number.

It is an amenable number.

722189 is a deficient number, since it is larger than the sum of its proper divisors (67243).

722189 is a wasteful number, since it uses less digits than its factorization.

722189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847.

The product of its digits is 2016, while the sum is 29.

The square root of 722189 is about 849.8170391325. The cubic root of 722189 is about 89.7188344705.

It can be divided in two parts, 72218 and 9, that added together give a palindrome (72227).

The spelling of 722189 in words is "seven hundred twenty-two thousand, one hundred eighty-nine".