199430199443 has 2 divisors, whose sum is σ = 199430199444. Its totient is φ = 199430199442.

The previous prime is 199430199407. The next prime is 199430199469. The reversal of 199430199443 is 344991034991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199430199443 - 2¹⁶ = 199430133907 is a prime.

It is not a weakly prime, because it can be changed into another prime (199430109443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99715099721 + 99715099722.

It is an arithmetic number, because the mean of its divisors is an integer number (99715099722).

Almost surely, 2^199430199443 is an apocalyptic number.

199430199443 is a deficient number, since it is larger than the sum of its proper divisors (1).

199430199443 is an equidigital number, since it uses as much as digits as its factorization.

199430199443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3779136, while the sum is 56.

The spelling of 199430199443 in words is "one hundred ninety-nine billion, four hundred thirty million, one hundred ninety-nine thousand, four hundred forty-three".