11917535839 has 4 divisors (see below), whose sum is σ = 13000948200. Its totient is φ = 10834123480.

The previous prime is 11917535803. The next prime is 11917535849. The reversal of 11917535839 is 93853571911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93853571911 = 11 ⋅8532142901.

It is a cyclic number.

It is not a de Polignac number, because 11917535839 - 2⁹ = 11917535327 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 (11917535849) 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, 541706164 + ... + 541706185.

It is an arithmetic number, because the mean of its divisors is an integer number (3250237050).

Almost surely, 2^11917535839 is an apocalyptic number.

11917535839 is a deficient number, since it is larger than the sum of its proper divisors (1083412361).

11917535839 is a wasteful number, since it uses less digits than its factorization.

11917535839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083412360.

The product of its digits is 1020600, while the sum is 52.

The spelling of 11917535839 in words is "eleven billion, nine hundred seventeen million, five hundred thirty-five thousand, eight hundred thirty-nine".