1984904879 has 2 divisors, whose sum is σ = 1984904880. Its totient is φ = 1984904878.

The previous prime is 1984904839. The next prime is 1984904881. The reversal of 1984904879 is 9784094891.

It is a strong prime.

It is an emirp because it is prime and its reverse (9784094891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1984904879 - 2¹⁶ = 1984839343 is a prime.

It is a Sophie Germain prime.

Together with 1984904881, 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 (1984904809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992452439 + 992452440.

It is an arithmetic number, because the mean of its divisors is an integer number (992452440).

Almost surely, 2^1984904879 is an apocalyptic number.

1984904879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984904879 is an equidigital number, since it uses as much as digits as its factorization.

1984904879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 59.

The square root of 1984904879 is about 44552.2713113484. The cubic root of 1984904879 is about 1256.7432648100.

The spelling of 1984904879 in words is "one billion, nine hundred eighty-four million, nine hundred four thousand, eight hundred seventy-nine".