194979448243 has 2 divisors, whose sum is σ = 194979448244. Its totient is φ = 194979448242.

The previous prime is 194979448211. The next prime is 194979448297. The reversal of 194979448243 is 342844979491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 194979448243 - 2⁵ = 194979448211 is a prime.

It is not a weakly prime, because it can be changed into another prime (194979448043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97489724121 + 97489724122.

It is an arithmetic number, because the mean of its divisors is an integer number (97489724122).

Almost surely, 2^194979448243 is an apocalyptic number.

194979448243 is a deficient number, since it is larger than the sum of its proper divisors (1).

194979448243 is an equidigital number, since it uses as much as digits as its factorization.

194979448243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62705664, while the sum is 64.

The spelling of 194979448243 in words is "one hundred ninety-four billion, nine hundred seventy-nine million, four hundred forty-eight thousand, two hundred forty-three".