83685899 has 24 divisors (see below), whose sum is σ = 98154000. Its totient is φ = 71089920.

The previous prime is 83685863. The next prime is 83685913. The reversal of 83685899 is 99858638.

It is a de Polignac number, because none of the positive numbers 2^k-83685899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83687899) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 204407 + ... + 204815.

It is an arithmetic number, because the mean of its divisors is an integer number (4089750).

Almost surely, 2^83685899 is an apocalyptic number.

83685899 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

83685899 is a deficient number, since it is larger than the sum of its proper divisors (14468101).

83685899 is a wasteful number, since it uses less digits than its factorization.

83685899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 528 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 56.

The square root of 83685899 is about 9147.9997267162. Note that the first 3 decimals coincide. The cubic root of 83685899 is about 437.4053546559.

The spelling of 83685899 in words is "eighty-three million, six hundred eighty-five thousand, eight hundred ninety-nine".