189425017 has 2 divisors, whose sum is σ = 189425018. Its totient is φ = 189425016.

The previous prime is 189425009. The next prime is 189425023. The reversal of 189425017 is 710524981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102637161 + 86787856 = 10131^2 + 9316^2 .

It is an emirp because it is prime and its reverse (710524981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189425017 - 2³ = 189425009 is a prime.

It is not a weakly prime, because it can be changed into another prime (189425057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94712508 + 94712509.

It is an arithmetic number, because the mean of its divisors is an integer number (94712509).

Almost surely, 2^189425017 is an apocalyptic number.

It is an amenable number.

189425017 is a deficient number, since it is larger than the sum of its proper divisors (1).

189425017 is an equidigital number, since it uses as much as digits as its factorization.

189425017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 189425017 is about 13763.1761232646. The cubic root of 189425017 is about 574.3092064696.

Adding to 189425017 its reverse (710524981), we get a palindrome (899949998).

The spelling of 189425017 in words is "one hundred eighty-nine million, four hundred twenty-five thousand, seventeen".