87113 has 4 divisors (see below), whose sum is σ = 93828. Its totient is φ = 80400.

The previous prime is 87107. The next prime is 87119. The reversal of 87113 is 31178.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (87107) and next prime (87119).

It can be written as a sum of positive squares in 2 ways, for example, as 23104 + 64009 = 152^2 + 253^2 .

It is a cyclic number.

It is not a de Polignac number, because 87113 - 2⁶ = 87049 is a prime.

It is a Duffinian number.

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 87113.

It is not an unprimeable number, because it can be changed into a prime (87119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3338 + ... + 3363.

It is an arithmetic number, because the mean of its divisors is an integer number (23457).

2⁸⁷¹¹³ is an apocalyptic number.

It is an amenable number.

87113 is a deficient number, since it is larger than the sum of its proper divisors (6715).

87113 is a wasteful number, since it uses less digits than its factorization.

87113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6714.

The product of its digits is 168, while the sum is 20.

The square root of 87113 is about 295.1491148555. The cubic root of 87113 is about 44.3296521463.

The spelling of 87113 in words is "eighty-seven thousand, one hundred thirteen".