189365123 has 2 divisors, whose sum is σ = 189365124. Its totient is φ = 189365122.

The previous prime is 189365119. The next prime is 189365129. The reversal of 189365123 is 321563981.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189365123 - 2² = 189365119 is a prime.

It is not a weakly prime, because it can be changed into another prime (189365129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94682561 + 94682562.

It is an arithmetic number, because the mean of its divisors is an integer number (94682562).

Almost surely, 2^189365123 is an apocalyptic number.

189365123 is a deficient number, since it is larger than the sum of its proper divisors (1).

189365123 is an equidigital number, since it uses as much as digits as its factorization.

189365123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 38.

The square root of 189365123 is about 13761.0000726691. Note that the first 4 decimals coincide. The cubic root of 189365123 is about 574.2486701121.

The spelling of 189365123 in words is "one hundred eighty-nine million, three hundred sixty-five thousand, one hundred twenty-three".