9798819001 has 2 divisors, whose sum is σ = 9798819002. Its totient is φ = 9798819000.

The previous prime is 9798818999. The next prime is 9798819029. The reversal of 9798819001 is 1009188979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7986103225 + 1812715776 = 89365^2 + 42576^2 .

It is an emirp because it is prime and its reverse (1009188979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9798819001 - 2¹ = 9798818999 is a prime.

Together with 9798818999, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 9798819001.

It is not a weakly prime, because it can be changed into another prime (9798819031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4899409500 + 4899409501.

It is an arithmetic number, because the mean of its divisors is an integer number (4899409501).

Almost surely, 2^9798819001 is an apocalyptic number.

It is an amenable number.

9798819001 is a deficient number, since it is larger than the sum of its proper divisors (1).

9798819001 is an equidigital number, since it uses as much as digits as its factorization.

9798819001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 52.

The square root of 9798819001 is about 98988.9842406720. The cubic root of 9798819001 is about 2139.8889948098. Note that the first 3 decimals are identical.

The spelling of 9798819001 in words is "nine billion, seven hundred ninety-eight million, eight hundred nineteen thousand, one".