90190775 has 12 divisors (see below), whose sum is σ = 114565584. Its totient is φ = 70392000.

The previous prime is 90190759. The next prime is 90190787. The reversal of 90190775 is 57709109.

It is not a de Polignac number, because 90190775 - 2⁴ = 90190759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42971 + ... + 45020.

It is an arithmetic number, because the mean of its divisors is an integer number (9547132).

Almost surely, 2^90190775 is an apocalyptic number.

90190775 is a deficient number, since it is larger than the sum of its proper divisors (24374809).

90190775 is a wasteful number, since it uses less digits than its factorization.

90190775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88042 (or 88037 counting only the distinct ones).

The product of its (nonzero) digits is 19845, while the sum is 38.

The square root of 90190775 is about 9496.8823831824. The cubic root of 90190775 is about 448.4568956270.

The spelling of 90190775 in words is "ninety million, one hundred ninety thousand, seven hundred seventy-five".