83684694539 has 4 divisors (see below), whose sum is σ = 83698323456. Its totient is φ = 83671065624.

The previous prime is 83684694521. The next prime is 83684694557. The reversal of 83684694539 is 93549648638.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93549648638 = 2 ⋅46774824319.

It is an interprime number because it is at equal distance from previous prime (83684694521) and next prime (83684694557).

It is a cyclic number.

It is not a de Polignac number, because 83684694539 - 2¹² = 83684690443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83684694239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6805244 + ... + 6817529.

It is an arithmetic number, because the mean of its divisors is an integer number (20924580864).

Almost surely, 2^83684694539 is an apocalyptic number.

83684694539 is a deficient number, since it is larger than the sum of its proper divisors (13628917).

83684694539 is a wasteful number, since it uses less digits than its factorization.

83684694539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13628916.

The product of its digits is 134369280, while the sum is 65.

The spelling of 83684694539 in words is "eighty-three billion, six hundred eighty-four million, six hundred ninety-four thousand, five hundred thirty-nine".