83839609 has 16 divisors (see below), whose sum is σ = 104342400. Its totient is φ = 65729664.

The previous prime is 83839603. The next prime is 83839621. The reversal of 83839609 is 90693838.

It is not a de Polignac number, because 83839609 - 2²¹ = 81742457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83839603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7012 + ... + 14725.

It is an arithmetic number, because the mean of its divisors is an integer number (6521400).

Almost surely, 2^83839609 is an apocalyptic number.

It is an amenable number.

83839609 is a deficient number, since it is larger than the sum of its proper divisors (20502791).

83839609 is a wasteful number, since it uses less digits than its factorization.

83839609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21792.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 83839609 is about 9156.3971626399. The cubic root of 83839609 is about 437.6729921595.

It can be divided in two parts, 83839 and 609, that added together give a palindrome (84448).

The spelling of 83839609 in words is "eighty-three million, eight hundred thirty-nine thousand, six hundred nine".