3863999987 has 2 divisors, whose sum is σ = 3863999988. Its totient is φ = 3863999986.

The previous prime is 3863999899. The next prime is 3864000031. The reversal of 3863999987 is 7899993683.

It is a strong prime.

It is an emirp because it is prime and its reverse (7899993683) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3863999987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3863999987.

It is not a weakly prime, because it can be changed into another prime (3863999387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1931999993 + 1931999994.

It is an arithmetic number, because the mean of its divisors is an integer number (1931999994).

Almost surely, 2^3863999987 is an apocalyptic number.

3863999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

3863999987 is an equidigital number, since it uses as much as digits as its factorization.

3863999987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158723712, while the sum is 71.

The square root of 3863999987 is about 62161.0809671132. The cubic root of 3863999987 is about 1569.2026712651.

The spelling of 3863999987 in words is "three billion, eight hundred sixty-three million, nine hundred ninety-nine thousand, nine hundred eighty-seven".