99816817 has 2 divisors, whose sum is σ = 99816818. Its totient is φ = 99816816.

The previous prime is 99816797. The next prime is 99816833. The reversal of 99816817 is 71861899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92852496 + 6964321 = 9636^2 + 2639^2 .

It is a cyclic number.

It is not a de Polignac number, because 99816817 - 2¹⁵ = 99784049 is a prime.

It is a super-2 number, since 2×99816817² = 19926793912022978, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99816917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49908408 + 49908409.

It is an arithmetic number, because the mean of its divisors is an integer number (49908409).

Almost surely, 2^99816817 is an apocalyptic number.

It is an amenable number.

99816817 is a deficient number, since it is larger than the sum of its proper divisors (1).

99816817 is an equidigital number, since it uses as much as digits as its factorization.

99816817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 49.

The square root of 99816817 is about 9990.8366516524. The cubic root of 99816817 is about 463.8752900701.

The spelling of 99816817 in words is "ninety-nine million, eight hundred sixteen thousand, eight hundred seventeen".