90999845 has 16 divisors (see below), whose sum is σ = 114428160. Its totient is φ = 69341184.

The previous prime is 90999817. The next prime is 90999851. The reversal of 90999845 is 54899909.

It is a cyclic number.

It is not a de Polignac number, because 90999845 - 2¹⁰ = 90998821 is a prime.

It is a Curzon 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, 28016 + ... + 31094.

It is an arithmetic number, because the mean of its divisors is an integer number (7151760).

Almost surely, 2^90999845 is an apocalyptic number.

It is an amenable number.

90999845 is a deficient number, since it is larger than the sum of its proper divisors (23428315).

90999845 is a wasteful number, since it uses less digits than its factorization.

90999845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364.

The product of its (nonzero) digits is 1049760, while the sum is 53.

The square root of 90999845 is about 9539.3838899585. The cubic root of 90999845 is about 449.7938891498.

The spelling of 90999845 in words is "ninety million, nine hundred ninety-nine thousand, eight hundred forty-five".