720536513 has 2 divisors, whose sum is σ = 720536514. Its totient is φ = 720536512.

The previous prime is 720536507. The next prime is 720536519. The reversal of 720536513 is 315635027.

It is a balanced prime because it is at equal distance from previous prime (720536507) and next prime (720536519).

It can be written as a sum of positive squares in only one way, i.e., 712195969 + 8340544 = 26687^2 + 2888^2 .

It is an emirp because it is prime and its reverse (315635027) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720536513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720536513.

It is not a weakly prime, because it can be changed into another prime (720536519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360268256 + 360268257.

It is an arithmetic number, because the mean of its divisors is an integer number (360268257).

Almost surely, 2^720536513 is an apocalyptic number.

It is an amenable number.

720536513 is a deficient number, since it is larger than the sum of its proper divisors (1).

720536513 is an equidigital number, since it uses as much as digits as its factorization.

720536513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 32.

The square root of 720536513 is about 26842.8111977863. The cubic root of 720536513 is about 896.5035173624.

The spelling of 720536513 in words is "seven hundred twenty million, five hundred thirty-six thousand, five hundred thirteen".