81087 has 8 divisors (see below), whose sum is σ = 109440. Its totient is φ = 53400.

The previous prime is 81083. The next prime is 81097. The reversal of 81087 is 78018.

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

It is not a de Polignac number, because 81087 - 2² = 81083 is a prime.

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 81087.

It is not an unprimeable number, because it can be changed into a prime (81083) 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, 364 + ... + 542.

It is an arithmetic number, because the mean of its divisors is an integer number (13680).

2⁸¹⁰⁸⁷ is an apocalyptic number.

81087 is a deficient number, since it is larger than the sum of its proper divisors (28353).

81087 is a wasteful number, since it uses less digits than its factorization.

81087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 81087 is about 284.7577918161. The cubic root of 81087 is about 43.2829723951.

The spelling of 81087 in words is "eighty-one thousand, eighty-seven".