83517982879 has 4 divisors (see below), whose sum is σ = 83531156176. Its totient is φ = 83504809584.

The previous prime is 83517982859. The next prime is 83517982907. The reversal of 83517982879 is 97828971538.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97828971538 = 2 ⋅48914485769.

It is a cyclic number.

It is not a de Polignac number, because 83517982879 - 2⁹ = 83517982367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83517982859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6577134 + ... + 6589819.

It is an arithmetic number, because the mean of its divisors is an integer number (20882789044).

Almost surely, 2^83517982879 is an apocalyptic number.

83517982879 is a deficient number, since it is larger than the sum of its proper divisors (13173297).

83517982879 is a wasteful number, since it uses less digits than its factorization.

83517982879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13173296.

The product of its digits is 60963840, while the sum is 67.

The spelling of 83517982879 in words is "eighty-three billion, five hundred seventeen million, nine hundred eighty-two thousand, eight hundred seventy-nine".