189909746104343 has 2 divisors, whose sum is σ = 189909746104344. Its totient is φ = 189909746104342.

The previous prime is 189909746104319. The next prime is 189909746104381. The reversal of 189909746104343 is 343401647909981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189909746104343 - 2⁶ = 189909746104279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189909746104313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94954873052171 + 94954873052172.

It is an arithmetic number, because the mean of its divisors is an integer number (94954873052172).

Almost surely, 2^{189909746104343} is an apocalyptic number.

189909746104343 is a deficient number, since it is larger than the sum of its proper divisors (1).

189909746104343 is an equidigital number, since it uses as much as digits as its factorization.

189909746104343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141087744, while the sum is 68.

The spelling of 189909746104343 in words is "one hundred eighty-nine trillion, nine hundred nine billion, seven hundred forty-six million, one hundred four thousand, three hundred forty-three".