720706013 has 2 divisors, whose sum is σ = 720706014. Its totient is φ = 720706012.

The previous prime is 720705991. The next prime is 720706027. The reversal of 720706013 is 310607027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 716793529 + 3912484 = 26773^2 + 1978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720706013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720706093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360353006 + 360353007.

It is an arithmetic number, because the mean of its divisors is an integer number (360353007).

Almost surely, 2^720706013 is an apocalyptic number.

It is an amenable number.

720706013 is a deficient number, since it is larger than the sum of its proper divisors (1).

720706013 is an equidigital number, since it uses as much as digits as its factorization.

720706013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 720706013 is about 26845.9682820345. The cubic root of 720706013 is about 896.5738100908.

The spelling of 720706013 in words is "seven hundred twenty million, seven hundred six thousand, thirteen".