83899805 has 16 divisors (see below), whose sum is σ = 110320704. Its totient is φ = 60746880.

The previous prime is 83899799. The next prime is 83899853. The reversal of 83899805 is 50899838.

It is not a de Polignac number, because 83899805 - 2⁴ = 83899789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9542 + ... + 16088.

It is an arithmetic number, because the mean of its divisors is an integer number (6895044).

Almost surely, 2^83899805 is an apocalyptic number.

It is an amenable number.

83899805 is a deficient number, since it is larger than the sum of its proper divisors (26420899).

83899805 is a wasteful number, since it uses less digits than its factorization.

83899805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6796.

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 83899805 is about 9159.6836735774. The cubic root of 83899805 is about 437.7777153758. Note that the first 4 decimals are identical.

The spelling of 83899805 in words is "eighty-three million, eight hundred ninety-nine thousand, eight hundred five".