99840599 has 4 divisors (see below), whose sum is σ = 99962736. Its totient is φ = 99718464.

The previous prime is 99840593. The next prime is 99840619. The reversal of 99840599 is 99504899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99504899 = 13 ⋅7654223.

It is a cyclic number.

It is not a de Polignac number, because 99840599 - 2⁴ = 99840583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99840599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99840593) 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 3 ways as a sum of consecutive naturals, for example, 59834 + ... + 61479.

It is an arithmetic number, because the mean of its divisors is an integer number (24990684).

Almost surely, 2^99840599 is an apocalyptic number.

99840599 is a deficient number, since it is larger than the sum of its proper divisors (122137).

99840599 is a wasteful number, since it uses less digits than its factorization.

99840599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122136.

The product of its (nonzero) digits is 1049760, while the sum is 53.

The square root of 99840599 is about 9992.0267713813. The cubic root of 99840599 is about 463.9121275705.

The spelling of 99840599 in words is "ninety-nine million, eight hundred forty thousand, five hundred ninety-nine".