189729361 has 2 divisors, whose sum is σ = 189729362. Its totient is φ = 189729360.

The previous prime is 189729359. The next prime is 189729403. The reversal of 189729361 is 163927981.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183196225 + 6533136 = 13535^2 + 2556^2 .

It is a cyclic number.

It is not a de Polignac number, because 189729361 - 2¹ = 189729359 is a prime.

Together with 189729359, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (189729341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94864680 + 94864681.

It is an arithmetic number, because the mean of its divisors is an integer number (94864681).

Almost surely, 2^189729361 is an apocalyptic number.

It is an amenable number.

189729361 is a deficient number, since it is larger than the sum of its proper divisors (1).

189729361 is an equidigital number, since it uses as much as digits as its factorization.

189729361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 46.

The square root of 189729361 is about 13774.2281453445. The cubic root of 189729361 is about 574.6166175296.

The spelling of 189729361 in words is "one hundred eighty-nine million, seven hundred twenty-nine thousand, three hundred sixty-one".