3981706219 has 2 divisors, whose sum is σ = 3981706220. Its totient is φ = 3981706218.

The previous prime is 3981706171. The next prime is 3981706243. The reversal of 3981706219 is 9126071893.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3981706219 - 2¹¹ = 3981704171 is a prime.

It is a super-2 number, since 2×3981706219² = 31707968828846551922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3981701219) 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, 1990853109 + 1990853110.

It is an arithmetic number, because the mean of its divisors is an integer number (1990853110).

Almost surely, 2^3981706219 is an apocalyptic number.

3981706219 is a deficient number, since it is larger than the sum of its proper divisors (1).

3981706219 is an equidigital number, since it uses as much as digits as its factorization.

3981706219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 3981706219 is about 63100.7624280404. The cubic root of 3981706219 is about 1584.9773894415.

The spelling of 3981706219 in words is "three billion, nine hundred eighty-one million, seven hundred six thousand, two hundred nineteen".