83899839 has 16 divisors (see below), whose sum is σ = 118004480. Its totient is φ = 52876800.

The previous prime is 83899799. The next prime is 83899853. The reversal of 83899839 is 93899838.

It is not a de Polignac number, because 83899839 - 2¹¹ = 83897791 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83899889) 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 15 ways as a sum of consecutive naturals, for example, 31614 + ... + 34164.

It is an arithmetic number, because the mean of its divisors is an integer number (7375280).

Almost surely, 2^83899839 is an apocalyptic number.

83899839 is a deficient number, since it is larger than the sum of its proper divisors (34104641).

83899839 is a wasteful number, since it uses less digits than its factorization.

83899839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3150.

The product of its digits is 3359232, while the sum is 57.

The square root of 83899839 is about 9159.6855295365. The cubic root of 83899839 is about 437.7777745115. Note that the first 5 decimals are identical.

Subtracting 83899839 from its reverse (93899838), we obtain a palindrome (9999999).

The spelling of 83899839 in words is "eighty-three million, eight hundred ninety-nine thousand, eight hundred thirty-nine".