3966021847 has 2 divisors, whose sum is σ = 3966021848. Its totient is φ = 3966021846.

The previous prime is 3966021803. The next prime is 3966021877. The reversal of 3966021847 is 7481206693.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3966021847 - 2¹⁹ = 3965497559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3966021797 and 3966021806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3966021877) 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, 1983010923 + 1983010924.

It is an arithmetic number, because the mean of its divisors is an integer number (1983010924).

Almost surely, 2^3966021847 is an apocalyptic number.

3966021847 is a deficient number, since it is larger than the sum of its proper divisors (1).

3966021847 is an equidigital number, since it uses as much as digits as its factorization.

3966021847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 3966021847 is about 62976.3594295510. The cubic root of 3966021847 is about 1582.8935183156.

The spelling of 3966021847 in words is "three billion, nine hundred sixty-six million, twenty-one thousand, eight hundred forty-seven".