83771 has 4 divisors (see below), whose sum is σ = 88200. Its totient is φ = 79344.

The previous prime is 83761. The next prime is 83773. The reversal of 83771 is 17738.

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

It is a de Polignac number, because none of the positive numbers 2^k-83771 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83771.

It is not an unprimeable number, because it can be changed into a prime (83773) 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, 2186 + ... + 2223.

It is an arithmetic number, because the mean of its divisors is an integer number (22050).

2⁸³⁷⁷¹ is an apocalyptic number.

83771 is a deficient number, since it is larger than the sum of its proper divisors (4429).

83771 is a wasteful number, since it uses less digits than its factorization.

83771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428.

The product of its digits is 1176, while the sum is 26.

The square root of 83771 is about 289.4322027695. The cubic root of 83771 is about 43.7553571671.

The spelling of 83771 in words is "eighty-three thousand, seven hundred seventy-one".