189523042321 has 2 divisors, whose sum is σ = 189523042322. Its totient is φ = 189523042320.

The previous prime is 189523042271. The next prime is 189523042343. The reversal of 189523042321 is 123240325981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110260523025 + 79262519296 = 332055^2 + 281536^2 .

It is an emirp because it is prime and its reverse (123240325981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189523042321 is a prime.

It is not a weakly prime, because it can be changed into another prime (189523042361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94761521160 + 94761521161.

It is an arithmetic number, because the mean of its divisors is an integer number (94761521161).

Almost surely, 2^189523042321 is an apocalyptic number.

It is an amenable number.

189523042321 is a deficient number, since it is larger than the sum of its proper divisors (1).

189523042321 is an equidigital number, since it uses as much as digits as its factorization.

189523042321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 189523042321 in words is "one hundred eighty-nine billion, five hundred twenty-three million, forty-two thousand, three hundred twenty-one".