43745873 has 2 divisors, whose sum is σ = 43745874. Its totient is φ = 43745872.

The previous prime is 43745837. The next prime is 43745887. The reversal of 43745873 is 37854734.

Together with previous prime (43745837) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36084049 + 7661824 = 6007^2 + 2768^2 .

It is a cyclic number.

It is not a de Polignac number, because 43745873 - 2¹⁰ = 43744849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43745873.

It is not a weakly prime, because it can be changed into another prime (43745473) 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 as a sum of consecutive naturals, namely, 21872936 + 21872937.

It is an arithmetic number, because the mean of its divisors is an integer number (21872937).

Almost surely, 2^43745873 is an apocalyptic number.

It is an amenable number.

43745873 is a deficient number, since it is larger than the sum of its proper divisors (1).

43745873 is an equidigital number, since it uses as much as digits as its factorization.

43745873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 41.

The square root of 43745873 is about 6614.0662984279. The cubic root of 43745873 is about 352.3538565589.

The spelling of 43745873 in words is "forty-three million, seven hundred forty-five thousand, eight hundred seventy-three".