90008887 has 4 divisors (see below), whose sum is σ = 91148320. Its totient is φ = 88869456.

The previous prime is 90008881. The next prime is 90008911. The reversal of 90008887 is 78880009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78880009 = 13 ⋅6067693.

It is a cyclic number.

It is not a de Polignac number, because 90008887 - 2³ = 90008879 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 (90008881) 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, 569598 + ... + 569755.

It is an arithmetic number, because the mean of its divisors is an integer number (22787080).

Almost surely, 2^90008887 is an apocalyptic number.

90008887 is a deficient number, since it is larger than the sum of its proper divisors (1139433).

90008887 is a wasteful number, since it uses less digits than its factorization.

90008887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139432.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 90008887 is about 9487.3013549692. The cubic root of 90008887 is about 448.1552246310.

The spelling of 90008887 in words is "ninety million, eight thousand, eight hundred eighty-seven".