9765999613 has 2 divisors, whose sum is σ = 9765999614. Its totient is φ = 9765999612.

The previous prime is 9765999599. The next prime is 9765999631. The reversal of 9765999613 is 3169995679.

Together with next prime (9765999631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9301252249 + 464747364 = 96443^2 + 21558^2 .

It is an emirp because it is prime and its reverse (3169995679) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9765999613 - 2⁹ = 9765999101 is a prime.

It is a super-2 number, since 2×9765999613² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9765999413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4882999806 + 4882999807.

It is an arithmetic number, because the mean of its divisors is an integer number (4882999807).

Almost surely, 2^9765999613 is an apocalyptic number.

It is an amenable number.

9765999613 is a deficient number, since it is larger than the sum of its proper divisors (1).

9765999613 is an equidigital number, since it uses as much as digits as its factorization.

9765999613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24800580, while the sum is 64.

The square root of 9765999613 is about 98823.0722705988. The cubic root of 9765999613 is about 2137.4972643764.

The spelling of 9765999613 in words is "nine billion, seven hundred sixty-five million, nine hundred ninety-nine thousand, six hundred thirteen".