99894217 has 2 divisors, whose sum is σ = 99894218. Its totient is φ = 99894216.

The previous prime is 99894131. The next prime is 99894247. The reversal of 99894217 is 71249899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86564416 + 13329801 = 9304^2 + 3651^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99894217 is a prime.

It is not a weakly prime, because it can be changed into another prime (99894247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49947108 + 49947109.

It is an arithmetic number, because the mean of its divisors is an integer number (49947109).

Almost surely, 2^99894217 is an apocalyptic number.

It is an amenable number.

99894217 is a deficient number, since it is larger than the sum of its proper divisors (1).

99894217 is an equidigital number, since it uses as much as digits as its factorization.

99894217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 49.

The square root of 99894217 is about 9994.7094505043. The cubic root of 99894217 is about 463.9951585528.

The spelling of 99894217 in words is "ninety-nine million, eight hundred ninety-four thousand, two hundred seventeen".