722319 has 8 divisors (see below), whose sum is σ = 1037232. Its totient is φ = 444480.

The previous prime is 722317. The next prime is 722321. The reversal of 722319 is 913227.

722319 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (722317) and next prime (722321).

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

It is not a de Polignac number, because 722319 - 2¹ = 722317 is a prime.

It is a super-2 number, since 2×722319² = 1043489475522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722311) 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, 9222 + ... + 9299.

It is an arithmetic number, because the mean of its divisors is an integer number (129654).

2⁷²²³¹⁹ is an apocalyptic number.

722319 is a deficient number, since it is larger than the sum of its proper divisors (314913).

722319 is a wasteful number, since it uses less digits than its factorization.

722319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18537.

The product of its digits is 756, while the sum is 24.

The square root of 722319 is about 849.8935227427. The cubic root of 722319 is about 89.7242175252.

The spelling of 722319 in words is "seven hundred twenty-two thousand, three hundred nineteen".