3873944209 has 2 divisors, whose sum is σ = 3873944210. Its totient is φ = 3873944208.

The previous prime is 3873944201. The next prime is 3873944237. The reversal of 3873944209 is 9024493783.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2052361809 + 1821582400 = 45303^2 + 42680^2 .

It is a cyclic number.

It is not a de Polignac number, because 3873944209 - 2³ = 3873944201 is a prime.

It is not a weakly prime, because it can be changed into another prime (3873944201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1936972104 + 1936972105.

It is an arithmetic number, because the mean of its divisors is an integer number (1936972105).

Almost surely, 2^3873944209 is an apocalyptic number.

It is an amenable number.

3873944209 is a deficient number, since it is larger than the sum of its proper divisors (1).

3873944209 is an equidigital number, since it uses as much as digits as its factorization.

3873944209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 3873944209 is about 62241.0170948387. The cubic root of 3873944209 is about 1570.5476619942.

The spelling of 3873944209 in words is "three billion, eight hundred seventy-three million, nine hundred forty-four thousand, two hundred nine".