3943873 has 2 divisors, whose sum is σ = 3943874. Its totient is φ = 3943872.

The previous prime is 3943871. The next prime is 3943883. The reversal of 3943873 is 3783493.

3943873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3908529 + 35344 = 1977^2 + 188^2 .

It is a cyclic number.

It is not a de Polignac number, because 3943873 - 2¹ = 3943871 is a prime.

Together with 3943871, it forms a pair of twin primes.

3943873 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3943871) 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, 1971936 + 1971937.

It is an arithmetic number, because the mean of its divisors is an integer number (1971937).

Almost surely, 2^3943873 is an apocalyptic number.

It is an amenable number.

3943873 is a deficient number, since it is larger than the sum of its proper divisors (1).

3943873 is an equidigital number, since it uses as much as digits as its factorization.

3943873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 3943873 is about 1985.9186791004. The cubic root of 3943873 is about 157.9941380082.

Subtracting from 3943873 its sum of digits (37), we obtain a triangular number (3943836 = T₂₈₀₈).

The spelling of 3943873 in words is "three million, nine hundred forty-three thousand, eight hundred seventy-three".