717213 has 32 divisors (see below), whose sum is σ = 1209600. Its totient is φ = 376320.

The previous prime is 717191. The next prime is 717229. The reversal of 717213 is 312717.

It is not a de Polignac number, because 717213 - 2⁶ = 717149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 717213.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 717213.

It is not an unprimeable number, because it can be changed into a prime (717293) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17473 + ... + 17513.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2⁷¹⁷²¹³ is an apocalyptic number.

It is an amenable number.

717213 is a deficient number, since it is larger than the sum of its proper divisors (492387).

717213 is a wasteful number, since it uses less digits than its factorization.

717213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 68 counting only the distinct ones).

The product of its digits is 294, while the sum is 21.

The square root of 717213 is about 846.8842896169. The cubic root of 717213 is about 89.5123002559.

Subtracting from 717213 its reverse (312717), we obtain a square (404496 = 636²).

The spelling of 717213 in words is "seven hundred seventeen thousand, two hundred thirteen".