83489726821 has 8 divisors (see below), whose sum is σ = 83991679200. Its totient is φ = 82987997232.

The previous prime is 83489726807. The next prime is 83489726833. The reversal of 83489726821 is 12862798438.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83489726821 - 2²⁷ = 83355509093 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 (83489726861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 729130 + ... + 835828.

It is an arithmetic number, because the mean of its divisors is an integer number (10498959900).

Almost surely, 2^83489726821 is an apocalyptic number.

It is an amenable number.

83489726821 is a deficient number, since it is larger than the sum of its proper divisors (501952379).

83489726821 is a wasteful number, since it uses less digits than its factorization.

83489726821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111395.

The product of its digits is 9289728, while the sum is 58.

The spelling of 83489726821 in words is "eighty-three billion, four hundred eighty-nine million, seven hundred twenty-six thousand, eight hundred twenty-one".