720000517 has 2 divisors, whose sum is σ = 720000518. Its totient is φ = 720000516.

The previous prime is 720000511. The next prime is 720000527. The reversal of 720000517 is 715000027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 679436356 + 40564161 = 26066^2 + 6369^2 .

It is a cyclic number.

It is not a de Polignac number, because 720000517 - 2³ = 720000509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720000511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360000258 + 360000259.

It is an arithmetic number, because the mean of its divisors is an integer number (360000259).

Almost surely, 2^720000517 is an apocalyptic number.

It is an amenable number.

720000517 is a deficient number, since it is larger than the sum of its proper divisors (1).

720000517 is an equidigital number, since it uses as much as digits as its factorization.

720000517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 490, while the sum is 22.

The square root of 720000517 is about 26832.8253637220. The cubic root of 720000517 is about 896.2811638379.

Subtracting from 720000517 its product of nonzero digits (490), we obtain a palindrome (720000027).

The spelling of 720000517 in words is "seven hundred twenty million, five hundred seventeen", and thus it is an aban number.