8887638901 has 2 divisors, whose sum is σ = 8887638902. Its totient is φ = 8887638900.

The previous prime is 8887638889. The next prime is 8887638917. The reversal of 8887638901 is 1098367888.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8658116401 + 229522500 = 93049^2 + 15150^2 .

It is a cyclic number.

It is not a de Polignac number, because 8887638901 - 2²⁵ = 8854084469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8887648901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4443819450 + 4443819451.

It is an arithmetic number, because the mean of its divisors is an integer number (4443819451).

Almost surely, 2^8887638901 is an apocalyptic number.

It is an amenable number.

8887638901 is a deficient number, since it is larger than the sum of its proper divisors (1).

8887638901 is an equidigital number, since it uses as much as digits as its factorization.

8887638901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4644864, while the sum is 58.

The square root of 8887638901 is about 94274.2748632945. The cubic root of 8887638901 is about 2071.3912326757.

The spelling of 8887638901 in words is "eight billion, eight hundred eighty-seven million, six hundred thirty-eight thousand, nine hundred one".