9900005 has 16 divisors (see below), whose sum is σ = 12801024. Its totient is φ = 7328640.

The previous prime is 9899999. The next prime is 9900047. The reversal of 9900005 is 5000099.

It is not a de Polignac number, because 9900005 - 2²⁰ = 8851429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2177 + ... + 4953.

It is an arithmetic number, because the mean of its divisors is an integer number (800064).

Almost surely, 2^9900005 is an apocalyptic number.

It is an amenable number.

9900005 is a deficient number, since it is larger than the sum of its proper divisors (2901019).

9900005 is a wasteful number, since it uses less digits than its factorization.

9900005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836.

The product of its (nonzero) digits is 405, while the sum is 23.

The square root of 9900005 is about 3146.4273390625. The cubic root of 9900005 is about 214.7229530505.

The spelling of 9900005 in words is "nine million, nine hundred thousand, five".