189321427 has 2 divisors, whose sum is σ = 189321428. Its totient is φ = 189321426.

The previous prime is 189321343. The next prime is 189321463. The reversal of 189321427 is 724123981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189321427 - 2¹¹ = 189319379 is a prime.

It is not a weakly prime, because it can be changed into another prime (189321497) 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, 94660713 + 94660714.

It is an arithmetic number, because the mean of its divisors is an integer number (94660714).

Almost surely, 2^189321427 is an apocalyptic number.

189321427 is a deficient number, since it is larger than the sum of its proper divisors (1).

189321427 is an equidigital number, since it uses as much as digits as its factorization.

189321427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 189321427 is about 13759.4123057636. The cubic root of 189321427 is about 574.2044974230.

The spelling of 189321427 in words is "one hundred eighty-nine million, three hundred twenty-one thousand, four hundred twenty-seven".