722817 has 16 divisors (see below), whose sum is σ = 1128000. Its totient is φ = 456192.

The previous prime is 722807. The next prime is 722819. The reversal of 722817 is 718227.

It is not a de Polignac number, because 722817 - 2¹⁰ = 721793 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (722819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192 + ... + 1217.

It is an arithmetic number, because the mean of its divisors is an integer number (70500).

2⁷²²⁸¹⁷ is an apocalyptic number.

It is an amenable number.

722817 is a deficient number, since it is larger than the sum of its proper divisors (405183).

722817 is a wasteful number, since it uses less digits than its factorization.

722817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437 (or 1431 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 722817 is about 850.1864501390. The cubic root of 722817 is about 89.7448327914.

The spelling of 722817 in words is "seven hundred twenty-two thousand, eight hundred seventeen".