189201923 has 2 divisors, whose sum is σ = 189201924. Its totient is φ = 189201922.

The previous prime is 189201893. The next prime is 189201973. The reversal of 189201923 is 329102981.

It is a weak prime.

It is an emirp because it is prime and its reverse (329102981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189201923 - 2⁸ = 189201667 is a prime.

It is not a weakly prime, because it can be changed into another prime (189201973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94600961 + 94600962.

It is an arithmetic number, because the mean of its divisors is an integer number (94600962).

Almost surely, 2^189201923 is an apocalyptic number.

189201923 is a deficient number, since it is larger than the sum of its proper divisors (1).

189201923 is an equidigital number, since it uses as much as digits as its factorization.

189201923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 189201923 is about 13755.0689929204. The cubic root of 189201923 is about 574.0836550043.

The spelling of 189201923 in words is "one hundred eighty-nine million, two hundred one thousand, nine hundred twenty-three".