8642913887 has 2 divisors, whose sum is σ = 8642913888. Its totient is φ = 8642913886.

The previous prime is 8642913827. The next prime is 8642913967. The reversal of 8642913887 is 7883192468.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8642913887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8642913827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4321456943 + 4321456944.

It is an arithmetic number, because the mean of its divisors is an integer number (4321456944).

Almost surely, 2^8642913887 is an apocalyptic number.

8642913887 is a deficient number, since it is larger than the sum of its proper divisors (1).

8642913887 is an equidigital number, since it uses as much as digits as its factorization.

8642913887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4644864, while the sum is 56.

The square root of 8642913887 is about 92967.2732040690. The cubic root of 8642913887 is about 2052.2017895602.

The spelling of 8642913887 in words is "eight billion, six hundred forty-two million, nine hundred thirteen thousand, eight hundred eighty-seven".