3989463817 has 2 divisors, whose sum is σ = 3989463818. Its totient is φ = 3989463816.

The previous prime is 3989463809. The next prime is 3989463853. The reversal of 3989463817 is 7183649893.

3989463817 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3948362896 + 41100921 = 62836^2 + 6411^2 .

It is a cyclic number.

It is not a de Polignac number, because 3989463817 - 2³ = 3989463809 is a prime.

It is not a weakly prime, because it can be changed into another prime (3989463857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994731908 + 1994731909.

It is an arithmetic number, because the mean of its divisors is an integer number (1994731909).

Almost surely, 2^3989463817 is an apocalyptic number.

It is an amenable number.

3989463817 is a deficient number, since it is larger than the sum of its proper divisors (1).

3989463817 is an equidigital number, since it uses as much as digits as its factorization.

3989463817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 58.

The square root of 3989463817 is about 63162.2024394337. The cubic root of 3989463817 is about 1586.0060640982.

The spelling of 3989463817 in words is "three billion, nine hundred eighty-nine million, four hundred sixty-three thousand, eight hundred seventeen".