3986641187 has 2 divisors, whose sum is σ = 3986641188. Its totient is φ = 3986641186.

The previous prime is 3986641081. The next prime is 3986641193. The reversal of 3986641187 is 7811466893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3986641187 - 2¹⁸ = 3986379043 is a prime.

It is not a weakly prime, because it can be changed into another prime (3986641787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1993320593 + 1993320594.

It is an arithmetic number, because the mean of its divisors is an integer number (1993320594).

Almost surely, 2^3986641187 is an apocalyptic number.

3986641187 is a deficient number, since it is larger than the sum of its proper divisors (1).

3986641187 is an equidigital number, since it uses as much as digits as its factorization.

3986641187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 53.

The square root of 3986641187 is about 63139.8541889352. The cubic root of 3986641187 is about 1585.6319315743.

The spelling of 3986641187 in words is "three billion, nine hundred eighty-six million, six hundred forty-one thousand, one hundred eighty-seven".