189481577 has 2 divisors, whose sum is σ = 189481578. Its totient is φ = 189481576.

The previous prime is 189481571. The next prime is 189481597. The reversal of 189481577 is 775184981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182358016 + 7123561 = 13504^2 + 2669^2 .

It is a cyclic number.

It is not a de Polignac number, because 189481577 - 2¹⁰ = 189480553 is a prime.

It is not a weakly prime, because it can be changed into another prime (189481571) 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, 94740788 + 94740789.

It is an arithmetic number, because the mean of its divisors is an integer number (94740789).

Almost surely, 2^189481577 is an apocalyptic number.

It is an amenable number.

189481577 is a deficient number, since it is larger than the sum of its proper divisors (1).

189481577 is an equidigital number, since it uses as much as digits as its factorization.

189481577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 50.

The square root of 189481577 is about 13765.2307281789. The cubic root of 189481577 is about 574.3663613565.

The spelling of 189481577 in words is "one hundred eighty-nine million, four hundred eighty-one thousand, five hundred seventy-seven".