43068821 has 2 divisors, whose sum is σ = 43068822. Its totient is φ = 43068820.

The previous prime is 43068743. The next prime is 43068829. The reversal of 43068821 is 12886034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27772900 + 15295921 = 5270^2 + 3911^2 .

It is a cyclic number.

It is not a de Polignac number, because 43068821 - 2¹⁴ = 43052437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43068829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21534410 + 21534411.

It is an arithmetic number, because the mean of its divisors is an integer number (21534411).

Almost surely, 2^43068821 is an apocalyptic number.

It is an amenable number.

43068821 is a deficient number, since it is larger than the sum of its proper divisors (1).

43068821 is an equidigital number, since it uses as much as digits as its factorization.

43068821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 43068821 is about 6562.6839783735. The cubic root of 43068821 is about 350.5266113428.

The spelling of 43068821 in words is "forty-three million, sixty-eight thousand, eight hundred twenty-one".