4243999987 has 2 divisors, whose sum is σ = 4243999988. Its totient is φ = 4243999986.

The previous prime is 4243999919. The next prime is 4244000017. The reversal of 4243999987 is 7899993424.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4243999987 is a prime.

It is not a weakly prime, because it can be changed into another prime (4243999687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121999993 + 2121999994.

It is an arithmetic number, because the mean of its divisors is an integer number (2121999994).

Almost surely, 2^4243999987 is an apocalyptic number.

4243999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243999987 is an equidigital number, since it uses as much as digits as its factorization.

4243999987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35271936, while the sum is 64.

The square root of 4243999987 is about 65145.9897998334. The cubic root of 4243999987 is about 1619.0432783924.

The spelling of 4243999987 in words is "four billion, two hundred forty-three million, nine hundred ninety-nine thousand, nine hundred eighty-seven".