3941423809 has 2 divisors, whose sum is σ = 3941423810. Its totient is φ = 3941423808.

The previous prime is 3941423753. The next prime is 3941423831. The reversal of 3941423809 is 9083241493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2693921409 + 1247502400 = 51903^2 + 35320^2 .

It is a cyclic number.

It is not a de Polignac number, because 3941423809 - 2²³ = 3933035201 is a prime.

It is not a weakly prime, because it can be changed into another prime (3941423869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1970711904 + 1970711905.

It is an arithmetic number, because the mean of its divisors is an integer number (1970711905).

Almost surely, 2^3941423809 is an apocalyptic number.

It is an amenable number.

3941423809 is a deficient number, since it is larger than the sum of its proper divisors (1).

3941423809 is an equidigital number, since it uses as much as digits as its factorization.

3941423809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 3941423809 is about 62780.7598631938. The cubic root of 3941423809 is about 1579.6142583669.

The spelling of 3941423809 in words is "three billion, nine hundred forty-one million, four hundred twenty-three thousand, eight hundred nine".