83840899 has 4 divisors (see below), whose sum is σ = 83861136. Its totient is φ = 83820664.

The previous prime is 83840893. The next prime is 83840909. The reversal of 83840899 is 99804838.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83840899 - 2⁹ = 83840387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83840893) 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 3 ways as a sum of consecutive naturals, for example, 1399 + ... + 13024.

It is an arithmetic number, because the mean of its divisors is an integer number (20965284).

Almost surely, 2^83840899 is an apocalyptic number.

83840899 is a deficient number, since it is larger than the sum of its proper divisors (20237).

83840899 is a wasteful number, since it uses less digits than its factorization.

83840899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20236.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 83840899 is about 9156.4676049228. The cubic root of 83840899 is about 437.6752369030.

The spelling of 83840899 in words is "eighty-three million, eight hundred forty thousand, eight hundred ninety-nine".