90005139 has 24 divisors (see below), whose sum is σ = 148861440. Its totient is φ = 51334128.

The previous prime is 90005137. The next prime is 90005173. The reversal of 90005139 is 93150009.

It is not a de Polignac number, because 90005139 - 2¹ = 90005137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90005137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44304 + ... + 46290.

It is an arithmetic number, because the mean of its divisors is an integer number (6202560).

Almost surely, 2^90005139 is an apocalyptic number.

90005139 is a deficient number, since it is larger than the sum of its proper divisors (58856301).

90005139 is a wasteful number, since it uses less digits than its factorization.

90005139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2719 (or 2716 counting only the distinct ones).

The product of its (nonzero) digits is 1215, while the sum is 27.

The square root of 90005139 is about 9487.1038257205. The cubic root of 90005139 is about 448.1490041004.

The spelling of 90005139 in words is "ninety million, five thousand, one hundred thirty-nine".