199864332287 has 2 divisors, whose sum is σ = 199864332288. Its totient is φ = 199864332286.

The previous prime is 199864332263. The next prime is 199864332323. The reversal of 199864332287 is 782233468991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199864332287 - 2²⁸ = 199595896831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199864332887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99932166143 + 99932166144.

It is an arithmetic number, because the mean of its divisors is an integer number (99932166144).

Almost surely, 2^199864332287 is an apocalyptic number.

199864332287 is a deficient number, since it is larger than the sum of its proper divisors (1).

199864332287 is an equidigital number, since it uses as much as digits as its factorization.

199864332287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31352832, while the sum is 62.

The spelling of 199864332287 in words is "one hundred ninety-nine billion, eight hundred sixty-four million, three hundred thirty-two thousand, two hundred eighty-seven".