722979 has 8 divisors (see below), whose sum is σ = 1071120. Its totient is φ = 481968.

The previous prime is 722977. The next prime is 722983. The reversal of 722979 is 979227.

It is not a de Polignac number, because 722979 - 2¹ = 722977 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (722971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13362 + ... + 13415.

It is an arithmetic number, because the mean of its divisors is an integer number (133890).

2⁷²²⁹⁷⁹ is an apocalyptic number.

722979 is a deficient number, since it is larger than the sum of its proper divisors (348141).

722979 is a wasteful number, since it uses less digits than its factorization.

722979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26786 (or 26780 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 722979 is about 850.2817180206. The cubic root of 722979 is about 89.7515369212.

The spelling of 722979 in words is "seven hundred twenty-two thousand, nine hundred seventy-nine".