43943423 has 2 divisors, whose sum is σ = 43943424. Its totient is φ = 43943422.

The previous prime is 43943359. The next prime is 43943441. The reversal of 43943423 is 32434934.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43943423 - 2⁶ = 43943359 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43943423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43943443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21971711 + 21971712.

It is an arithmetic number, because the mean of its divisors is an integer number (21971712).

Almost surely, 2^43943423 is an apocalyptic number.

43943423 is a deficient number, since it is larger than the sum of its proper divisors (1).

43943423 is an equidigital number, since it uses as much as digits as its factorization.

43943423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 32.

The square root of 43943423 is about 6628.9835570772. The cubic root of 43943423 is about 352.8834530866.

The spelling of 43943423 in words is "forty-three million, nine hundred forty-three thousand, four hundred twenty-three".