3940819819 has 2 divisors, whose sum is σ = 3940819820. Its totient is φ = 3940819818.

The previous prime is 3940819801. The next prime is 3940819829. The reversal of 3940819819 is 9189180493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3940819819 - 2⁹ = 3940819307 is a prime.

It is a super-2 number, since 2×3940819819² = 31060121691646385522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3940819829) 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, 1970409909 + 1970409910.

It is an arithmetic number, because the mean of its divisors is an integer number (1970409910).

Almost surely, 2^3940819819 is an apocalyptic number.

3940819819 is a deficient number, since it is larger than the sum of its proper divisors (1).

3940819819 is an equidigital number, since it uses as much as digits as its factorization.

3940819819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 52.

The square root of 3940819819 is about 62775.9493675723. The cubic root of 3940819819 is about 1579.5335667183.

The spelling of 3940819819 in words is "three billion, nine hundred forty million, eight hundred nineteen thousand, eight hundred nineteen".