99208217 has 4 divisors (see below), whose sum is σ = 102629220. Its totient is φ = 95787216.

The previous prime is 99208189. The next prime is 99208259. The reversal of 99208217 is 71280299.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71280299 = 1493 ⋅47743.

It can be written as a sum of positive squares in 2 ways, for example, as 17106496 + 82101721 = 4136^2 + 9061^2 .

It is a cyclic number.

It is not a de Polignac number, because 99208217 - 2⁸ = 99207961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99208517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1710458 + ... + 1710515.

It is an arithmetic number, because the mean of its divisors is an integer number (25657305).

Almost surely, 2^99208217 is an apocalyptic number.

It is an amenable number.

99208217 is a deficient number, since it is larger than the sum of its proper divisors (3421003).

99208217 is a wasteful number, since it uses less digits than its factorization.

99208217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421002.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 99208217 is about 9960.3321731758. The cubic root of 99208217 is about 462.9305921237.

The spelling of 99208217 in words is "ninety-nine million, two hundred eight thousand, two hundred seventeen".