189473321 has 2 divisors, whose sum is σ = 189473322. Its totient is φ = 189473320.

The previous prime is 189473299. The next prime is 189473413. The reversal of 189473321 is 123374981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173949721 + 15523600 = 13189^2 + 3940^2 .

It is an emirp because it is prime and its reverse (123374981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189473321 - 2¹⁴ = 189456937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (189478321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94736660 + 94736661.

It is an arithmetic number, because the mean of its divisors is an integer number (94736661).

Almost surely, 2^189473321 is an apocalyptic number.

It is an amenable number.

189473321 is a deficient number, since it is larger than the sum of its proper divisors (1).

189473321 is an equidigital number, since it uses as much as digits as its factorization.

189473321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 189473321 is about 13764.9308389109. The cubic root of 189473321 is about 574.3580192305.

The spelling of 189473321 in words is "one hundred eighty-nine million, four hundred seventy-three thousand, three hundred twenty-one".