99900917 has 4 divisors (see below), whose sum is σ = 105158880. Its totient is φ = 94642956.

The previous prime is 99900893. The next prime is 99900923. The reversal of 99900917 is 71900999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99900917 - 2¹² = 99896821 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 (99900947) 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, 2628953 + ... + 2628990.

It is an arithmetic number, because the mean of its divisors is an integer number (26289720).

Almost surely, 2^99900917 is an apocalyptic number.

It is an amenable number.

99900917 is a deficient number, since it is larger than the sum of its proper divisors (5257963).

99900917 is a wasteful number, since it uses less digits than its factorization.

99900917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5257962.

The product of its (nonzero) digits is 45927, while the sum is 44.

The square root of 99900917 is about 9995.0446222115. The cubic root of 99900917 is about 464.0055318529.

The spelling of 99900917 in words is "ninety-nine million, nine hundred thousand, nine hundred seventeen".