199632027209 has 2 divisors, whose sum is σ = 199632027210. Its totient is φ = 199632027208.

The previous prime is 199632027173. The next prime is 199632027229. The reversal of 199632027209 is 902720236991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176786611600 + 22845415609 = 420460^2 + 151147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199632027209 is a prime.

It is not a weakly prime, because it can be changed into another prime (199632027229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99816013604 + 99816013605.

It is an arithmetic number, because the mean of its divisors is an integer number (99816013605).

Almost surely, 2^199632027209 is an apocalyptic number.

It is an amenable number.

199632027209 is a deficient number, since it is larger than the sum of its proper divisors (1).

199632027209 is an equidigital number, since it uses as much as digits as its factorization.

199632027209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 50.

The spelling of 199632027209 in words is "one hundred ninety-nine billion, six hundred thirty-two million, twenty-seven thousand, two hundred nine".