189356543 has 2 divisors, whose sum is σ = 189356544. Its totient is φ = 189356542.

The previous prime is 189356533. The next prime is 189356551. The reversal of 189356543 is 345653981.

It is a strong prime.

It is an emirp because it is prime and its reverse (345653981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189356543 - 2²⁶ = 122247679 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 189356494 and 189356503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189356533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94678271 + 94678272.

It is an arithmetic number, because the mean of its divisors is an integer number (94678272).

Almost surely, 2^189356543 is an apocalyptic number.

189356543 is a deficient number, since it is larger than the sum of its proper divisors (1).

189356543 is an equidigital number, since it uses as much as digits as its factorization.

189356543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 44.

The square root of 189356543 is about 13760.6883185399. The cubic root of 189356543 is about 574.2399970472.

The spelling of 189356543 in words is "one hundred eighty-nine million, three hundred fifty-six thousand, five hundred forty-three".