9980209847 has 2 divisors, whose sum is σ = 9980209848. Its totient is φ = 9980209846.

The previous prime is 9980209777. The next prime is 9980209849. The reversal of 9980209847 is 7489020899.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9980209847 - 2¹⁶ = 9980144311 is a prime.

Together with 9980209849, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9980209792 and 9980209801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9980209849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4990104923 + 4990104924.

It is an arithmetic number, because the mean of its divisors is an integer number (4990104924).

Almost surely, 2^9980209847 is an apocalyptic number.

9980209847 is a deficient number, since it is larger than the sum of its proper divisors (1).

9980209847 is an equidigital number, since it uses as much as digits as its factorization.

9980209847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The square root of 9980209847 is about 99901.0002302279. Note that the first 3 decimals coincide. The cubic root of 9980209847 is about 2153.0125317231.

The spelling of 9980209847 in words is "nine billion, nine hundred eighty million, two hundred nine thousand, eight hundred forty-seven".