90000005 has 8 divisors (see below), whose sum is σ = 108052512. Its totient is φ = 71965008.

The previous prime is 89999999. The next prime is 90000049. The reversal of 90000005 is 50000009.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90000005 - 2¹⁰ = 89998981 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 (5) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13814 + ... + 19256.

It is an arithmetic number, because the mean of its divisors is an integer number (13506564).

Almost surely, 2^90000005 is an apocalyptic number.

It is an amenable number.

90000005 is a deficient number, since it is larger than the sum of its proper divisors (18052507).

90000005 is a wasteful number, since it uses less digits than its factorization.

90000005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8755.

The product of its (nonzero) digits is 45, while the sum is 14.

The square root of 90000005 is about 9486.8332440283. The cubic root of 90000005 is about 448.1404829546.

The spelling of 90000005 in words is "ninety million, five", and thus it is an aban number and an uban number.