720506573 has 2 divisors, whose sum is σ = 720506574. Its totient is φ = 720506572.

The previous prime is 720506503. The next prime is 720506603. The reversal of 720506573 is 375605027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 718079209 + 2427364 = 26797^2 + 1558^2 .

It is a cyclic number.

It is not a de Polignac number, because 720506573 - 2²² = 716312269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720506503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360253286 + 360253287.

It is an arithmetic number, because the mean of its divisors is an integer number (360253287).

Almost surely, 2^720506573 is an apocalyptic number.

It is an amenable number.

720506573 is a deficient number, since it is larger than the sum of its proper divisors (1).

720506573 is an equidigital number, since it uses as much as digits as its factorization.

720506573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 35.

The square root of 720506573 is about 26842.2535007775. The cubic root of 720506573 is about 896.4910999084.

The spelling of 720506573 in words is "seven hundred twenty million, five hundred six thousand, five hundred seventy-three".