83871111 has 8 divisors (see below), whose sum is σ = 117713920. Its totient is φ = 52971192.

The previous prime is 83871091. The next prime is 83871121. The reversal of 83871111 is 11117838.

It is a happy number.

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

It is not a de Polignac number, because 83871111 - 2⁵ = 83871079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83871121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735655 + ... + 735768.

It is an arithmetic number, because the mean of its divisors is an integer number (14714240).

Almost surely, 2^83871111 is an apocalyptic number.

83871111 is a deficient number, since it is larger than the sum of its proper divisors (33842809).

83871111 is a wasteful number, since it uses less digits than its factorization.

83871111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471445.

The product of its digits is 1344, while the sum is 30.

The square root of 83871111 is about 9158.1172191668. The cubic root of 83871111 is about 437.7278025618.

Adding to 83871111 its reverse (11117838), we get a palindrome (94988949).

The spelling of 83871111 in words is "eighty-three million, eight hundred seventy-one thousand, one hundred eleven".