99818219 has 2 divisors, whose sum is σ = 99818220. Its totient is φ = 99818218.

The previous prime is 99818209. The next prime is 99818269. The reversal of 99818219 is 91281899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99818219 - 2¹⁶ = 99752683 is a prime.

It is a super-2 number, since 2×99818219² = 19927353688663922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99818209) 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, 49909109 + 49909110.

It is an arithmetic number, because the mean of its divisors is an integer number (49909110).

Almost surely, 2^99818219 is an apocalyptic number.

99818219 is a deficient number, since it is larger than the sum of its proper divisors (1).

99818219 is an equidigital number, since it uses as much as digits as its factorization.

99818219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 47.

The square root of 99818219 is about 9990.9068157000. The cubic root of 99818219 is about 463.8774618822.

The spelling of 99818219 in words is "ninety-nine million, eight hundred eighteen thousand, two hundred nineteen".