989898787898833 has 2 divisors, whose sum is σ = 989898787898834. Its totient is φ = 989898787898832.

The previous prime is 989898787898791. The next prime is 989898787898861. The reversal of 989898787898833 is 338898787898989.

It is a happy number.

989898787898833 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 565933268579904 + 423965519318929 = 23789352^2 + 20590423^2 .

It is an emirp because it is prime and its reverse (338898787898989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 989898787898833 - 2²⁹ = 989898251027921 is a prime.

It is a super-2 number, since 2×989898787898833² (a number of 31 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (989898787898873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494949393949416 + 494949393949417.

It is an arithmetic number, because the mean of its divisors is an integer number (494949393949417).

Almost surely, 2^{989898787898833} is an apocalyptic number.

It is an amenable number.

989898787898833 is a deficient number, since it is larger than the sum of its proper divisors (1).

989898787898833 is an equidigital number, since it uses as much as digits as its factorization.

989898787898833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6067901693952, while the sum is 112.

The spelling of 989898787898833 in words is "nine hundred eighty-nine trillion, eight hundred ninety-eight billion, seven hundred eighty-seven million, eight hundred ninety-eight thousand, eight hundred thirty-three".