99888799 has 4 divisors (see below), whose sum is σ = 100805320. Its totient is φ = 98972280.

The previous prime is 99888791. The next prime is 99888809. The reversal of 99888799 is 99788899.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99788899 = 7 ⋅14255557.

It is a cyclic number.

It is not a de Polignac number, because 99888799 - 2³ = 99888791 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 (99888791) 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, 458097 + ... + 458314.

It is an arithmetic number, because the mean of its divisors is an integer number (25201330).

Almost surely, 2^99888799 is an apocalyptic number.

99888799 is a deficient number, since it is larger than the sum of its proper divisors (916521).

99888799 is a wasteful number, since it uses less digits than its factorization.

99888799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916520.

The product of its digits is 23514624, while the sum is 67.

The square root of 99888799 is about 9994.4384034322. The cubic root of 99888799 is about 463.9867697749.

The spelling of 99888799 in words is "ninety-nine million, eight hundred eighty-eight thousand, seven hundred ninety-nine".