99168889 has 4 divisors (see below), whose sum is σ = 99236980. Its totient is φ = 99100800.

The previous prime is 99168877. The next prime is 99168929. The reversal of 99168889 is 98886199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98886199 = 401 ⋅246599.

It can be written as a sum of positive squares in 2 ways, for example, as 50168889 + 49000000 = 7083^2 + 7000^2 .

It is a cyclic number.

It is not a de Polignac number, because 99168889 - 2⁵ = 99168857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99168829) 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, 31812 + ... + 34789.

It is an arithmetic number, because the mean of its divisors is an integer number (24809245).

Almost surely, 2^99168889 is an apocalyptic number.

It is an amenable number.

99168889 is a deficient number, since it is larger than the sum of its proper divisors (68091).

99168889 is a wasteful number, since it uses less digits than its factorization.

99168889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68090.

The product of its digits is 2239488, while the sum is 58.

The square root of 99168889 is about 9958.3577461347. The cubic root of 99168889 is about 462.8694125791.

The spelling of 99168889 in words is "ninety-nine million, one hundred sixty-eight thousand, eight hundred eighty-nine".