189459923 has 2 divisors, whose sum is σ = 189459924. Its totient is φ = 189459922.

The previous prime is 189459889. The next prime is 189459937. The reversal of 189459923 is 329954981.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189459923 is a prime.

It is not a weakly prime, because it can be changed into another prime (189459983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94729961 + 94729962.

It is an arithmetic number, because the mean of its divisors is an integer number (94729962).

Almost surely, 2^189459923 is an apocalyptic number.

189459923 is a deficient number, since it is larger than the sum of its proper divisors (1).

189459923 is an equidigital number, since it uses as much as digits as its factorization.

189459923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 50.

The square root of 189459923 is about 13764.4441587737. Note that the first 3 decimals coincide. The cubic root of 189459923 is about 574.3444809479.

The spelling of 189459923 in words is "one hundred eighty-nine million, four hundred fifty-nine thousand, nine hundred twenty-three".