722859 has 4 divisors (see below), whose sum is σ = 963816. Its totient is φ = 481904.

The previous prime is 722849. The next prime is 722881. The reversal of 722859 is 958227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 722859 - 2¹⁶ = 657323 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (722819) 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 3 ways as a sum of consecutive naturals, for example, 120474 + ... + 120479.

It is an arithmetic number, because the mean of its divisors is an integer number (240954).

2⁷²²⁸⁵⁹ is an apocalyptic number.

722859 is a deficient number, since it is larger than the sum of its proper divisors (240957).

722859 is a wasteful number, since it uses less digits than its factorization.

722859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240956.

The product of its digits is 10080, while the sum is 33.

The square root of 722859 is about 850.2111502445. The cubic root of 722859 is about 89.7465709953.

The spelling of 722859 in words is "seven hundred twenty-two thousand, eight hundred fifty-nine".