8989898861 has 2 divisors, whose sum is σ = 8989898862. Its totient is φ = 8989898860.

The previous prime is 8989898831. The next prime is 8989898867. The reversal of 8989898861 is 1688989898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7679893225 + 1310005636 = 87635^2 + 36194^2 .

It is a cyclic number.

It is not a de Polignac number, because 8989898861 - 2¹⁰ = 8989897837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8989898867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4494949430 + 4494949431.

It is an arithmetic number, because the mean of its divisors is an integer number (4494949431).

Almost surely, 2^8989898861 is an apocalyptic number.

It is an amenable number.

8989898861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8989898861 is an equidigital number, since it uses as much as digits as its factorization.

8989898861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 143327232, while the sum is 74.

The square root of 8989898861 is about 94815.0771818491. The cubic root of 8989898861 is about 2079.3053385567.

The spelling of 8989898861 in words is "eight billion, nine hundred eighty-nine million, eight hundred ninety-eight thousand, eight hundred sixty-one".