189442823 has 2 divisors, whose sum is σ = 189442824. Its totient is φ = 189442822.

The previous prime is 189442801. The next prime is 189442861. The reversal of 189442823 is 328244981.

189442823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189442823 - 2¹² = 189438727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189442873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94721411 + 94721412.

It is an arithmetic number, because the mean of its divisors is an integer number (94721412).

Almost surely, 2^189442823 is an apocalyptic number.

189442823 is a deficient number, since it is larger than the sum of its proper divisors (1).

189442823 is an equidigital number, since it uses as much as digits as its factorization.

189442823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 41.

The square root of 189442823 is about 13763.8229791000. The cubic root of 189442823 is about 574.3272009765.

The spelling of 189442823 in words is "one hundred eighty-nine million, four hundred forty-two thousand, eight hundred twenty-three".