99799965 has 32 divisors (see below), whose sum is σ = 180345600. Its totient is φ = 52349760.

The previous prime is 99799963. The next prime is 99799981. The reversal of 99799965 is 56999799.

It is not a de Polignac number, because 99799965 - 2¹ = 99799963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99799963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2176 + ... + 14294.

It is an arithmetic number, because the mean of its divisors is an integer number (5635800).

Almost surely, 2^99799965 is an apocalyptic number.

It is an amenable number.

99799965 is a deficient number, since it is larger than the sum of its proper divisors (80545635).

99799965 is a wasteful number, since it uses less digits than its factorization.

99799965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12194 (or 12188 counting only the distinct ones).

The product of its digits is 12400290, while the sum is 63.

The square root of 99799965 is about 9989.9932432410. The cubic root of 99799965 is about 463.8491833591.

The spelling of 99799965 in words is "ninety-nine million, seven hundred ninety-nine thousand, nine hundred sixty-five".