83689771 has 6 divisors (see below), whose sum is σ = 91989716. Its totient is φ = 76081500.

The previous prime is 83689763. The next prime is 83689777. The reversal of 83689771 is 17798638.

It is not a de Polignac number, because 83689771 - 2³ = 83689763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83689777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 345705 + ... + 345946.

Almost surely, 2^83689771 is an apocalyptic number.

83689771 is a deficient number, since it is larger than the sum of its proper divisors (8299945).

83689771 is a wasteful number, since it uses less digits than its factorization.

83689771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691673 (or 691662 counting only the distinct ones).

The product of its digits is 508032, while the sum is 49.

The square root of 83689771 is about 9148.2113552322. The cubic root of 83689771 is about 437.4121005451.

The spelling of 83689771 in words is "eighty-three million, six hundred eighty-nine thousand, seven hundred seventy-one".