189229121 has 2 divisors, whose sum is σ = 189229122. Its totient is φ = 189229120.

The previous prime is 189229049. The next prime is 189229141. The reversal of 189229121 is 121922981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110019121 + 79210000 = 10489^2 + 8900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189229121 is a prime.

It is not a weakly prime, because it can be changed into another prime (189229141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94614560 + 94614561.

It is an arithmetic number, because the mean of its divisors is an integer number (94614561).

Almost surely, 2^189229121 is an apocalyptic number.

It is an amenable number.

189229121 is a deficient number, since it is larger than the sum of its proper divisors (1).

189229121 is an equidigital number, since it uses as much as digits as its factorization.

189229121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 35.

The square root of 189229121 is about 13756.0576111036. The cubic root of 189229121 is about 574.1111620875. Note that the first 4 decimals are identical.

It can be divided in two parts, 1892 and 29121, that added together give a palindrome (31013).

The spelling of 189229121 in words is "one hundred eighty-nine million, two hundred twenty-nine thousand, one hundred twenty-one".