3843685409 has 2 divisors, whose sum is σ = 3843685410. Its totient is φ = 3843685408.

The previous prime is 3843685403. The next prime is 3843685423. The reversal of 3843685409 is 9045863483.

It is a happy number.

3843685409 is digitally balanced in base 2 and base 3, because in such bases 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., 3042625600 + 801059809 = 55160^2 + 28303^2 .

It is a cyclic number.

It is not a de Polignac number, because 3843685409 - 2¹² = 3843681313 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3843685403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1921842704 + 1921842705.

It is an arithmetic number, because the mean of its divisors is an integer number (1921842705).

Almost surely, 2^3843685409 is an apocalyptic number.

It is an amenable number.

3843685409 is a deficient number, since it is larger than the sum of its proper divisors (1).

3843685409 is an equidigital number, since it uses as much as digits as its factorization.

3843685409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 50.

The square root of 3843685409 is about 61997.4629238971. The cubic root of 3843685409 is about 1566.4478646347.

The spelling of 3843685409 in words is "three billion, eight hundred forty-three million, six hundred eighty-five thousand, four hundred nine".