189289417 has 2 divisors, whose sum is σ = 189289418. Its totient is φ = 189289416.

The previous prime is 189289411. The next prime is 189289421. The reversal of 189289417 is 714982981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168714121 + 20575296 = 12989^2 + 4536^2 .

It is a cyclic number.

It is not a de Polignac number, because 189289417 - 2²³ = 180900809 is a prime.

It is not a weakly prime, because it can be changed into another prime (189289411) 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, 94644708 + 94644709.

It is an arithmetic number, because the mean of its divisors is an integer number (94644709).

Almost surely, 2^189289417 is an apocalyptic number.

It is an amenable number.

189289417 is a deficient number, since it is larger than the sum of its proper divisors (1).

189289417 is an equidigital number, since it uses as much as digits as its factorization.

189289417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 49.

The square root of 189289417 is about 13758.2490528410. The cubic root of 189289417 is about 574.1721339055.

The spelling of 189289417 in words is "one hundred eighty-nine million, two hundred eighty-nine thousand, four hundred seventeen".