90105915 has 32 divisors (see below), whose sum is σ = 149057280. Its totient is φ = 46445184.

The previous prime is 90105907. The next prime is 90105931. The reversal of 90105915 is 51950109.

It is not a de Polignac number, because 90105915 - 2³ = 90105907 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98892 + ... + 99798.

It is an arithmetic number, because the mean of its divisors is an integer number (4658040).

Almost surely, 2^90105915 is an apocalyptic number.

90105915 is a deficient number, since it is larger than the sum of its proper divisors (58951365).

90105915 is a wasteful number, since it uses less digits than its factorization.

90105915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131.

The product of its (nonzero) digits is 2025, while the sum is 30.

The square root of 90105915 is about 9492.4135497775. The cubic root of 90105915 is about 448.3162012896.

The spelling of 90105915 in words is "ninety million, one hundred five thousand, nine hundred fifteen".