9798901111 has 2 divisors, whose sum is σ = 9798901112. Its totient is φ = 9798901110.

The previous prime is 9798901109. The next prime is 9798901121. The reversal of 9798901111 is 1111098979.

It is a weak prime.

It is an emirp because it is prime and its reverse (1111098979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9798901111 - 2¹ = 9798901109 is a prime.

Together with 9798901109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9798901121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4899450555 + 4899450556.

It is an arithmetic number, because the mean of its divisors is an integer number (4899450556).

Almost surely, 2^9798901111 is an apocalyptic number.

9798901111 is a deficient number, since it is larger than the sum of its proper divisors (1).

9798901111 is an equidigital number, since it uses as much as digits as its factorization.

9798901111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 46.

The square root of 9798901111 is about 98989.3989829214. The cubic root of 9798901111 is about 2139.8949719177.

It can be divided in two parts, 979 and 8901111, that added together give a triangular number (8902090 = T₄₂₁₉).

The spelling of 9798901111 in words is "nine billion, seven hundred ninety-eight million, nine hundred one thousand, one hundred eleven".