83824721979 has 16 divisors (see below), whose sum is σ = 112436341248. Its totient is φ = 55549120032.

The previous prime is 83824721963. The next prime is 83824722029. The reversal of 83824721979 is 97912742838.

It is not a de Polignac number, because 83824721979 - 2⁴ = 83824721963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83824721179) 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, 214009 + ... + 462005.

It is an arithmetic number, because the mean of its divisors is an integer number (7027271328).

Almost surely, 2^83824721979 is an apocalyptic number.

83824721979 is a deficient number, since it is larger than the sum of its proper divisors (28611619269).

83824721979 is a wasteful number, since it uses less digits than its factorization.

83824721979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248674.

The product of its digits is 12192768, while the sum is 60.

The spelling of 83824721979 in words is "eighty-three billion, eight hundred twenty-four million, seven hundred twenty-one thousand, nine hundred seventy-nine".