3986897843 has 2 divisors, whose sum is σ = 3986897844. Its totient is φ = 3986897842.

The previous prime is 3986897821. The next prime is 3986897867. The reversal of 3986897843 is 3487986893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3986897843 - 2¹⁰ = 3986896819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3986897843.

It is not a weakly prime, because it can be changed into another prime (3986497843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1993448921 + 1993448922.

It is an arithmetic number, because the mean of its divisors is an integer number (1993448922).

Almost surely, 2^3986897843 is an apocalyptic number.

3986897843 is a deficient number, since it is larger than the sum of its proper divisors (1).

3986897843 is an equidigital number, since it uses as much as digits as its factorization.

3986897843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62705664, while the sum is 65.

The square root of 3986897843 is about 63141.8865967750. The cubic root of 3986897843 is about 1585.6659579804.

The spelling of 3986897843 in words is "three billion, nine hundred eighty-six million, eight hundred ninety-seven thousand, eight hundred forty-three".