716817217 has 4 divisors (see below), whose sum is σ = 716901076. Its totient is φ = 716733360.

The previous prime is 716817203. The next prime is 716817251. The reversal of 716817217 is 712718617.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1201216 + 715616001 = 1096^2 + 26751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-716817217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 716817217.

It is not an unprimeable number, because it can be changed into a prime (716847217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27438 + ... + 46759.

It is an arithmetic number, because the mean of its divisors is an integer number (179225269).

Almost surely, 2^716817217 is an apocalyptic number.

It is an amenable number.

716817217 is a deficient number, since it is larger than the sum of its proper divisors (83859).

716817217 is an equidigital number, since it uses as much as digits as its factorization.

716817217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83858.

The product of its digits is 32928, while the sum is 40.

The square root of 716817217 is about 26773.4423823310. The cubic root of 716817217 is about 894.9583189602.

The spelling of 716817217 in words is "seven hundred sixteen million, eight hundred seventeen thousand, two hundred seventeen".