83921843 has 12 divisors (see below), whose sum is σ = 90847440. Its totient is φ = 77480832.

The previous prime is 83921839. The next prime is 83921857. The reversal of 83921843 is 34812938.

It is not a de Polignac number, because 83921843 - 2² = 83921839 is a prime.

It is a super-3 number, since 3×83921843³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83921797 and 83921806.

It is not an unprimeable number, because it can be changed into a prime (83921833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12578 + ... + 18056.

It is an arithmetic number, because the mean of its divisors is an integer number (7570620).

Almost surely, 2^83921843 is an apocalyptic number.

83921843 is a deficient number, since it is larger than the sum of its proper divisors (6925597).

83921843 is a wasteful number, since it uses less digits than its factorization.

83921843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5566 (or 5549 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 83921843 is about 9160.8865837319. The cubic root of 83921843 is about 437.8160424441.

The spelling of 83921843 in words is "eighty-three million, nine hundred twenty-one thousand, eight hundred forty-three".