189907999009 has 2 divisors, whose sum is σ = 189907999010. Its totient is φ = 189907999008.

The previous prime is 189907998989. The next prime is 189907999013. The reversal of 189907999009 is 900999709981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144987315984 + 44920683025 = 380772^2 + 211945^2 .

It is a cyclic number.

It is not a de Polignac number, because 189907999009 - 2¹⁷ = 189907867937 is a prime.

It is not a weakly prime, because it can be changed into another prime (189907999019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94953999504 + 94953999505.

It is an arithmetic number, because the mean of its divisors is an integer number (94953999505).

Almost surely, 2^189907999009 is an apocalyptic number.

It is an amenable number.

189907999009 is a deficient number, since it is larger than the sum of its proper divisors (1).

189907999009 is an equidigital number, since it uses as much as digits as its factorization.

189907999009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29760696, while the sum is 70.

The spelling of 189907999009 in words is "one hundred eighty-nine billion, nine hundred seven million, nine hundred ninety-nine thousand, nine".