722779 has 8 divisors (see below), whose sum is σ = 770000. Its totient is φ = 676512.

The previous prime is 722749. The next prime is 722783. The reversal of 722779 is 977227.

It is a happy number.

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 722779 - 2¹⁹ = 198491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1897 + ... + 2245.

It is an arithmetic number, because the mean of its divisors is an integer number (96250).

2⁷²²⁷⁷⁹ is an apocalyptic number.

722779 is a deficient number, since it is larger than the sum of its proper divisors (47221).

722779 is a wasteful number, since it uses less digits than its factorization.

722779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477.

The product of its digits is 12348, while the sum is 34.

The square root of 722779 is about 850.1641018062. The cubic root of 722779 is about 89.7432600727.

The spelling of 722779 in words is "seven hundred twenty-two thousand, seven hundred seventy-nine".