88691 has 4 divisors (see below), whose sum is σ = 91584.
Its totient is φ = 85800.
The previous prime is 88681. The next prime is 88721. The reversal of 88691 is 19688.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 88691 - 214 = 72307 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (88651) 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, 1400 + ... + 1461.
It is an arithmetic number, because the mean of its divisors is an integer number (22896).
288691 is an apocalyptic number.
88691 is a deficient number, since it is larger than the sum of its proper divisors (2893).
88691 is a wasteful number, since it uses less digits than its factorization.
88691 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2892.
The product of its digits is 3456, while the sum is 32.
The square root of 88691 is about 297.8103423322.
The cubic root of 88691 is about 44.5957203961.
The spelling of 88691 in words is "eighty-eight thousand, six hundred ninety-one".