87611 has 4 divisors (see below), whose sum is σ = 88800. Its totient is φ = 86424.

The previous prime is 87589. The next prime is 87613. The reversal of 87611 is 11678.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11678 = 2 ⋅5839.

It is a cyclic number.

It is not a de Polignac number, because 87611 - 2⁶ = 87547 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (87613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476 + ... + 633.

It is an arithmetic number, because the mean of its divisors is an integer number (22200).

2⁸⁷⁶¹¹ is an apocalyptic number.

87611 is a deficient number, since it is larger than the sum of its proper divisors (1189).

87611 is a wasteful number, since it uses less digits than its factorization.

87611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188.

The product of its digits is 336, while the sum is 23.

The square root of 87611 is about 295.9915539336. The cubic root of 87611 is about 44.4139649820.

The spelling of 87611 in words is "eighty-seven thousand, six hundred eleven".