189650009 has 2 divisors, whose sum is σ = 189650010. Its totient is φ = 189650008.

The previous prime is 189650003. The next prime is 189650057. The reversal of 189650009 is 900056981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158256400 + 31393609 = 12580^2 + 5603^2 .

It is an emirp because it is prime and its reverse (900056981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189650009 - 2¹² = 189645913 is a prime.

It is not a weakly prime, because it can be changed into another prime (189650003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94825004 + 94825005.

It is an arithmetic number, because the mean of its divisors is an integer number (94825005).

Almost surely, 2^189650009 is an apocalyptic number.

It is an amenable number.

189650009 is a deficient number, since it is larger than the sum of its proper divisors (1).

189650009 is an equidigital number, since it uses as much as digits as its factorization.

189650009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 189650009 is about 13771.3473923215. The cubic root of 189650009 is about 574.5364975526.

The spelling of 189650009 in words is "one hundred eighty-nine million, six hundred fifty thousand, nine".