201866099 has 2 divisors, whose sum is σ = 201866100. Its totient is φ = 201866098.

The previous prime is 201865999. The next prime is 201866107. The reversal of 201866099 is 990668102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201866099 - 2²⁰ = 200817523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201866299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100933049 + 100933050.

It is an arithmetic number, because the mean of its divisors is an integer number (100933050).

Almost surely, 2^201866099 is an apocalyptic number.

201866099 is a deficient number, since it is larger than the sum of its proper divisors (1).

201866099 is an equidigital number, since it uses as much as digits as its factorization.

201866099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 201866099 is about 14207.9590019116. The cubic root of 201866099 is about 586.6167554316.

The spelling of 201866099 in words is "two hundred one million, eight hundred sixty-six thousand, ninety-nine".