989898989898919 has 2 divisors, whose sum is σ = 989898989898920. Its totient is φ = 989898989898918.

The previous prime is 989898989898887. The next prime is 989898989898937. The reversal of 989898989898919 is 919898989898989.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (919898989898989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 989898989898919 - 2⁵ = 989898989898887 is a prime.

It is a super-2 number, since 2×989898989898919² (a number of 31 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 989898989898919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989898989898619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494949494949459 + 494949494949460.

It is an arithmetic number, because the mean of its divisors is an integer number (494949494949460).

Almost surely, 2^{989898989898919} is an apocalyptic number.

989898989898919 is a deficient number, since it is larger than the sum of its proper divisors (1).

989898989898919 is an equidigital number, since it uses as much as digits as its factorization.

989898989898919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11284439629824, while the sum is 121.

The spelling of 989898989898919 in words is "nine hundred eighty-nine trillion, eight hundred ninety-eight billion, nine hundred eighty-nine million, eight hundred ninety-eight thousand, nine hundred nineteen".