99859213 has 2 divisors, whose sum is σ = 99859214. Its totient is φ = 99859212.

The previous prime is 99859171. The next prime is 99859223. The reversal of 99859213 is 31295899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83229129 + 16630084 = 9123^2 + 4078^2 .

It is an emirp because it is prime and its reverse (31295899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99859213 - 2⁹ = 99858701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99859223) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49929606 + 49929607.

It is an arithmetic number, because the mean of its divisors is an integer number (49929607).

Almost surely, 2^99859213 is an apocalyptic number.

It is an amenable number.

99859213 is a deficient number, since it is larger than the sum of its proper divisors (1).

99859213 is an equidigital number, since it uses as much as digits as its factorization.

99859213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 46.

The square root of 99859213 is about 9992.9581706320. The cubic root of 99859213 is about 463.9409559357.

The spelling of 99859213 in words is "ninety-nine million, eight hundred fifty-nine thousand, two hundred thirteen".