3864981817 has 2 divisors, whose sum is σ = 3864981818. Its totient is φ = 3864981816.

The previous prime is 3864981797. The next prime is 3864981833. The reversal of 3864981817 is 7181894683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3224081961 + 640899856 = 56781^2 + 25316^2 .

It is a cyclic number.

It is not a de Polignac number, because 3864981817 - 2⁷ = 3864981689 is a prime.

It is not a weakly prime, because it can be changed into another prime (3864981877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1932490908 + 1932490909.

It is an arithmetic number, because the mean of its divisors is an integer number (1932490909).

Almost surely, 2^3864981817 is an apocalyptic number.

It is an amenable number.

3864981817 is a deficient number, since it is larger than the sum of its proper divisors (1).

3864981817 is an equidigital number, since it uses as much as digits as its factorization.

3864981817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 55.

The square root of 3864981817 is about 62168.9779311193. The cubic root of 3864981817 is about 1569.3355697975.

The spelling of 3864981817 in words is "three billion, eight hundred sixty-four million, nine hundred eighty-one thousand, eight hundred seventeen".