83688811 has 4 divisors (see below), whose sum is σ = 85469472. Its totient is φ = 81908152.

The previous prime is 83688799. The next prime is 83688821. The reversal of 83688811 is 11888638.

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 83688811 - 2²⁵ = 50134379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83688821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890260 + ... + 890353.

It is an arithmetic number, because the mean of its divisors is an integer number (21367368).

Almost surely, 2^83688811 is an apocalyptic number.

83688811 is a deficient number, since it is larger than the sum of its proper divisors (1780661).

83688811 is a wasteful number, since it uses less digits than its factorization.

83688811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780660.

The product of its digits is 73728, while the sum is 43.

The square root of 83688811 is about 9148.1588858087. The cubic root of 83688811 is about 437.4104280300.

The spelling of 83688811 in words is "eighty-three million, six hundred eighty-eight thousand, eight hundred eleven".