99775 has 12 divisors (see below), whose sum is σ = 133672. Its totient is φ = 73440.

The previous prime is 99767. The next prime is 99787. The reversal of 99775 is 57799.

It is not a de Polignac number, because 99775 - 2³ = 99767 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172 + ... + 478.

2⁹⁹⁷⁷⁵ is an apocalyptic number.

99775 is a deficient number, since it is larger than the sum of its proper divisors (33897).

99775 is a wasteful number, since it uses less digits than its factorization.

99775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 325 counting only the distinct ones).

The product of its digits is 19845, while the sum is 37.

The square root of 99775 is about 315.8718094417. The cubic root of 99775 is about 46.3810502783.

The spelling of 99775 in words is "ninety-nine thousand, seven hundred seventy-five".