9919772982839 has 4 divisors (see below), whose sum is σ = 9919779725856. Its totient is φ = 9919766239824.

The previous prime is 9919772982817. The next prime is 9919772982857. The reversal of 9919772982839 is 9382892779199.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9919772982839 - 2²⁰ = 9919771934263 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 (9919772985839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118799 + ... + 4455744.

It is an arithmetic number, because the mean of its divisors is an integer number (2479944931464).

Almost surely, 2^{9919772982839} is an apocalyptic number.

9919772982839 is a deficient number, since it is larger than the sum of its proper divisors (6743017).

9919772982839 is a wasteful number, since it uses less digits than its factorization.

9919772982839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6743016.

The product of its digits is 2222131968, while the sum is 83.

The spelling of 9919772982839 in words is "nine trillion, nine hundred nineteen billion, seven hundred seventy-two million, nine hundred eighty-two thousand, eight hundred thirty-nine".