83688911 has 4 divisors (see below), whose sum is σ = 83827392. Its totient is φ = 83550432.

The previous prime is 83688883. The next prime is 83688919. The reversal of 83688911 is 11988638.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83688911 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 (83688919) 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, 68330 + ... + 69543.

It is an arithmetic number, because the mean of its divisors is an integer number (20956848).

Almost surely, 2^83688911 is an apocalyptic number.

83688911 is a deficient number, since it is larger than the sum of its proper divisors (138481).

83688911 is a wasteful number, since it uses less digits than its factorization.

83688911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138480.

The product of its digits is 82944, while the sum is 44.

The square root of 83688911 is about 9148.1643513877. The cubic root of 83688911 is about 437.4106022509.

The spelling of 83688911 in words is "eighty-three million, six hundred eighty-eight thousand, nine hundred eleven".