1984198847 has 2 divisors, whose sum is σ = 1984198848. Its totient is φ = 1984198846.

The previous prime is 1984198829. The next prime is 1984198849. The reversal of 1984198847 is 7488914891.

It is a strong prime.

It is an emirp because it is prime and its reverse (7488914891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1984198847 - 2¹⁴ = 1984182463 is a prime.

It is a super-2 number, since 2×1984198847² = 7874090128872258818, which contains 22 as substring.

Together with 1984198849, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1984198849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992099423 + 992099424.

It is an arithmetic number, because the mean of its divisors is an integer number (992099424).

Almost surely, 2^1984198847 is an apocalyptic number.

1984198847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984198847 is an equidigital number, since it uses as much as digits as its factorization.

1984198847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4644864, while the sum is 59.

The square root of 1984198847 is about 44544.3469701824. The cubic root of 1984198847 is about 1256.5942389976.

The spelling of 1984198847 in words is "one billion, nine hundred eighty-four million, one hundred ninety-eight thousand, eight hundred forty-seven".