83843021 has 2 divisors, whose sum is σ = 83843022. Its totient is φ = 83843020.

The previous prime is 83843009. The next prime is 83843033. The reversal of 83843021 is 12034838.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (83843009) and next prime (83843033).

It can be written as a sum of positive squares in only one way, i.e., 54834025 + 29008996 = 7405^2 + 5386^2 .

It is a cyclic number.

It is not a de Polignac number, because 83843021 - 2¹⁰ = 83841997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83843821) 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 as a sum of consecutive naturals, namely, 41921510 + 41921511.

It is an arithmetic number, because the mean of its divisors is an integer number (41921511).

Almost surely, 2^83843021 is an apocalyptic number.

It is an amenable number.

83843021 is a deficient number, since it is larger than the sum of its proper divisors (1).

83843021 is an equidigital number, since it uses as much as digits as its factorization.

83843021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 83843021 is about 9156.5834785688. The cubic root of 83843021 is about 437.6789293691.

Adding to 83843021 its reverse (12034838), we get a palindrome (95877859).

The spelling of 83843021 in words is "eighty-three million, eight hundred forty-three thousand, twenty-one".