83881911 has 4 divisors (see below), whose sum is σ = 111842552. Its totient is φ = 55921272.

The previous prime is 83881909. The next prime is 83881921. The reversal of 83881911 is 11918838.

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

It is not a de Polignac number, because 83881911 - 2¹ = 83881909 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 83881911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83881921) 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, 13980316 + ... + 13980321.

It is an arithmetic number, because the mean of its divisors is an integer number (27960638).

Almost surely, 2^83881911 is an apocalyptic number.

83881911 is a deficient number, since it is larger than the sum of its proper divisors (27960641).

83881911 is a wasteful number, since it uses less digits than its factorization.

83881911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27960640.

The product of its digits is 13824, while the sum is 39.

The square root of 83881911 is about 9158.7068410338. The cubic root of 83881911 is about 437.7465903475.

The spelling of 83881911 in words is "eighty-three million, eight hundred eighty-one thousand, nine hundred eleven".