43666873 has 2 divisors, whose sum is σ = 43666874. Its totient is φ = 43666872.

The previous prime is 43666867. The next prime is 43666877. The reversal of 43666873 is 37866634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32296489 + 11370384 = 5683^2 + 3372^2 .

It is a cyclic number.

It is not a de Polignac number, because 43666873 - 2¹⁷ = 43535801 is a prime.

It is not a weakly prime, because it can be changed into another prime (43666877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21833436 + 21833437.

It is an arithmetic number, because the mean of its divisors is an integer number (21833437).

Almost surely, 2^43666873 is an apocalyptic number.

It is an amenable number.

43666873 is a deficient number, since it is larger than the sum of its proper divisors (1).

43666873 is an equidigital number, since it uses as much as digits as its factorization.

43666873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 43.

The square root of 43666873 is about 6608.0914793910. The cubic root of 43666873 is about 352.1416252803.

The spelling of 43666873 in words is "forty-three million, six hundred sixty-six thousand, eight hundred seventy-three".