3985579847 has 2 divisors, whose sum is σ = 3985579848. Its totient is φ = 3985579846.

The previous prime is 3985579799. The next prime is 3985579861. The reversal of 3985579847 is 7489755893.

3985579847 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3985579847 - 2¹⁸ = 3985317703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3985579867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1992789923 + 1992789924.

It is an arithmetic number, because the mean of its divisors is an integer number (1992789924).

Almost surely, 2^3985579847 is an apocalyptic number.

3985579847 is a deficient number, since it is larger than the sum of its proper divisors (1).

3985579847 is an equidigital number, since it uses as much as digits as its factorization.

3985579847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76204800, while the sum is 65.

The square root of 3985579847 is about 63131.4489537505. The cubic root of 3985579847 is about 1585.4912079359.

The spelling of 3985579847 in words is "three billion, nine hundred eighty-five million, five hundred seventy-nine thousand, eight hundred forty-seven".