1992998243 has 2 divisors, whose sum is σ = 1992998244. Its totient is φ = 1992998242.

The previous prime is 1992998239. The next prime is 1992998251. The reversal of 1992998243 is 3428992991.

It is a weak prime.

It is an emirp because it is prime and its reverse (3428992991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1992998243 - 2² = 1992998239 is a prime.

It is not a weakly prime, because it can be changed into another prime (1992998143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996499121 + 996499122.

It is an arithmetic number, because the mean of its divisors is an integer number (996499122).

Almost surely, 2^1992998243 is an apocalyptic number.

1992998243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1992998243 is an equidigital number, since it uses as much as digits as its factorization.

1992998243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 56.

The square root of 1992998243 is about 44643.0088927707. The cubic root of 1992998243 is about 1258.4490539581.

The spelling of 1992998243 in words is "one billion, nine hundred ninety-two million, nine hundred ninety-eight thousand, two hundred forty-three".