82984823921 has 4 divisors (see below), whose sum is σ = 82985407344. Its totient is φ = 82984240500.

The previous prime is 82984823891. The next prime is 82984823939. The reversal of 82984823921 is 12932848928.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, 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 82984823921 - 2¹⁰ = 82984822897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82984823021) 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, 76946 + ... + 414596.

It is an arithmetic number, because the mean of its divisors is an integer number (20746351836).

Almost surely, 2^82984823921 is an apocalyptic number.

It is an amenable number.

82984823921 is a deficient number, since it is larger than the sum of its proper divisors (583423).

82984823921 is a wasteful number, since it uses less digits than its factorization.

82984823921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583422.

The product of its digits is 3981312, while the sum is 56.

The spelling of 82984823921 in words is "eighty-two billion, nine hundred eighty-four million, eight hundred twenty-three thousand, nine hundred twenty-one".