90775 has 6 divisors (see below), whose sum is σ = 112592. Its totient is φ = 72600.

The previous prime is 90749. The next prime is 90787. The reversal of 90775 is 57709.

It is not a de Polignac number, because 90775 - 2⁷ = 90647 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 5 ways as a sum of consecutive naturals, for example, 1791 + ... + 1840.

2⁹⁰⁷⁷⁵ is an apocalyptic number.

90775 is a deficient number, since it is larger than the sum of its proper divisors (21817).

90775 is a wasteful number, since it uses less digits than its factorization.

90775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3641 (or 3636 counting only the distinct ones).

The product of its (nonzero) digits is 2205, while the sum is 28.

The square root of 90775 is about 301.2888979037. The cubic root of 90775 is about 44.9423129118.

The spelling of 90775 in words is "ninety thousand, seven hundred seventy-five".