91887 has 8 divisors (see below), whose sum is σ = 124080. Its totient is φ = 60480.

The previous prime is 91873. The next prime is 91909. The reversal of 91887 is 78819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91887 - 2⁶ = 91823 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 91887.

It is not an unprimeable number, because it can be changed into a prime (91807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187 + ... + 467.

It is an arithmetic number, because the mean of its divisors is an integer number (15510).

2⁹¹⁸⁸⁷ is an apocalyptic number.

91887 is a deficient number, since it is larger than the sum of its proper divisors (32193).

91887 is a wasteful number, since it uses less digits than its factorization.

91887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393.

The product of its digits is 4032, while the sum is 33.

The square root of 91887 is about 303.1286855446. The cubic root of 91887 is about 45.1250840871.

The spelling of 91887 in words is "ninety-one thousand, eight hundred eighty-seven".