87775 has 6 divisors (see below), whose sum is σ = 108872. Its totient is φ = 70200.

The previous prime is 87767. The next prime is 87793. The reversal of 87775 is 57778.

It is a happy number.

It is not a de Polignac number, because 87775 - 2³ = 87767 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 87775.

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, 1731 + ... + 1780.

2⁸⁷⁷⁷⁵ is an apocalyptic number.

87775 is a deficient number, since it is larger than the sum of its proper divisors (21097).

87775 is a wasteful number, since it uses less digits than its factorization.

87775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521 (or 3516 counting only the distinct ones).

The product of its digits is 13720, while the sum is 34.

The square root of 87775 is about 296.2684593405. The cubic root of 87775 is about 44.4416607053.

The spelling of 87775 in words is "eighty-seven thousand, seven hundred seventy-five".