8642987719 has 2 divisors, whose sum is σ = 8642987720. Its totient is φ = 8642987718.

The previous prime is 8642987713. The next prime is 8642987737. The reversal of 8642987719 is 9177892468.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8642987719 - 2⁹ = 8642987207 is a prime.

It is a super-2 number, since 2×8642987719² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8642987713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4321493859 + 4321493860.

It is an arithmetic number, because the mean of its divisors is an integer number (4321493860).

Almost surely, 2^8642987719 is an apocalyptic number.

8642987719 is a deficient number, since it is larger than the sum of its proper divisors (1).

8642987719 is an equidigital number, since it uses as much as digits as its factorization.

8642987719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 61.

The square root of 8642987719 is about 92967.6702891925. The cubic root of 8642987719 is about 2052.2076331809.

The spelling of 8642987719 in words is "eight billion, six hundred forty-two million, nine hundred eighty-seven thousand, seven hundred nineteen".