99908917 has 4 divisors (see below), whose sum is σ = 102609196. Its totient is φ = 97208640.

The previous prime is 99908903. The next prime is 99908927. The reversal of 99908917 is 71980999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69372241 + 30536676 = 8329^2 + 5526^2 .

It is a cyclic number.

It is not a de Polignac number, because 99908917 - 2¹⁹ = 99384629 is a prime.

It is a super-2 number, since 2×99908917² = 19963583392225778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99908927) 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, 1350084 + ... + 1350157.

It is an arithmetic number, because the mean of its divisors is an integer number (25652299).

Almost surely, 2^99908917 is an apocalyptic number.

It is an amenable number.

99908917 is a deficient number, since it is larger than the sum of its proper divisors (2700279).

99908917 is a wasteful number, since it uses less digits than its factorization.

99908917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2700278.

The product of its (nonzero) digits is 367416, while the sum is 52.

The square root of 99908917 is about 9995.4448125133. Note that the first 3 decimals coincide. The cubic root of 99908917 is about 464.0179172753.

The spelling of 99908917 in words is "ninety-nine million, nine hundred eight thousand, nine hundred seventeen".