99765013 has 4 divisors (see below), whose sum is σ = 102198348. Its totient is φ = 97331680.

The previous prime is 99764999. The next prime is 99765019. The reversal of 99765013 is 31056799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31056799 = 313 ⋅99223.

It can be written as a sum of positive squares in 2 ways, for example, as 55980324 + 43784689 = 7482^2 + 6617^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99765013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99765019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1216606 + ... + 1216687.

It is an arithmetic number, because the mean of its divisors is an integer number (25549587).

Almost surely, 2^99765013 is an apocalyptic number.

It is an amenable number.

99765013 is a deficient number, since it is larger than the sum of its proper divisors (2433335).

99765013 is a wasteful number, since it uses less digits than its factorization.

99765013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433334.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 99765013 is about 9988.2437395170. The cubic root of 99765013 is about 463.7950271956.

The spelling of 99765013 in words is "ninety-nine million, seven hundred sixty-five thousand, thirteen".