720310013 has 2 divisors, whose sum is σ = 720310014. Its totient is φ = 720310012.

The previous prime is 720309991. The next prime is 720310027. The reversal of 720310013 is 310013027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 547466404 + 172843609 = 23398^2 + 13147^2 .

It is an emirp because it is prime and its reverse (310013027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720310013 - 2⁸ = 720309757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 720309973 and 720310000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720310813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360155006 + 360155007.

It is an arithmetic number, because the mean of its divisors is an integer number (360155007).

Almost surely, 2^720310013 is an apocalyptic number.

It is an amenable number.

720310013 is a deficient number, since it is larger than the sum of its proper divisors (1).

720310013 is an equidigital number, since it uses as much as digits as its factorization.

720310013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 720310013 is about 26838.5918594847. The cubic root of 720310013 is about 896.4095691614.

The spelling of 720310013 in words is "seven hundred twenty million, three hundred ten thousand, thirteen".