189907934443 has 2 divisors, whose sum is σ = 189907934444. Its totient is φ = 189907934442.

The previous prime is 189907934441. The next prime is 189907934453. The reversal of 189907934443 is 344439709981.

It is a weak prime.

It is an emirp because it is prime and its reverse (344439709981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189907934443 - 2¹ = 189907934441 is a prime.

Together with 189907934441, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (189907934441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94953967221 + 94953967222.

It is an arithmetic number, because the mean of its divisors is an integer number (94953967222).

Almost surely, 2^189907934443 is an apocalyptic number.

189907934443 is a deficient number, since it is larger than the sum of its proper divisors (1).

189907934443 is an equidigital number, since it uses as much as digits as its factorization.

189907934443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23514624, while the sum is 61.

The spelling of 189907934443 in words is "one hundred eighty-nine billion, nine hundred seven million, nine hundred thirty-four thousand, four hundred forty-three".