3985855243 has 2 divisors, whose sum is σ = 3985855244. Its totient is φ = 3985855242.

The previous prime is 3985855193. The next prime is 3985855267. The reversal of 3985855243 is 3425585893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3985855243 - 2¹³ = 3985847051 is a prime.

It is not a weakly prime, because it can be changed into another prime (3985855273) 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, 1992927621 + 1992927622.

It is an arithmetic number, because the mean of its divisors is an integer number (1992927622).

Almost surely, 2^3985855243 is an apocalyptic number.

3985855243 is a deficient number, since it is larger than the sum of its proper divisors (1).

3985855243 is an equidigital number, since it uses as much as digits as its factorization.

3985855243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184000, while the sum is 52.

The square root of 3985855243 is about 63133.6300477012. The cubic root of 3985855243 is about 1585.5277252388.

The spelling of 3985855243 in words is "three billion, nine hundred eighty-five million, eight hundred fifty-five thousand, two hundred forty-three".