99990217 has 8 divisors (see below), whose sum is σ = 106696160. Its totient is φ = 93428640.

The previous prime is 99990181. The next prime is 99990239. The reversal of 99990217 is 71209999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99990217 - 2¹⁵ = 99957449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99990287) 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 in 7 ways as a sum of consecutive naturals, for example, 34659 + ... + 37432.

It is an arithmetic number, because the mean of its divisors is an integer number (13337020).

Almost surely, 2^99990217 is an apocalyptic number.

It is an amenable number.

99990217 is a deficient number, since it is larger than the sum of its proper divisors (6705943).

99990217 is a wasteful number, since it uses less digits than its factorization.

99990217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72183.

The product of its (nonzero) digits is 91854, while the sum is 46.

The square root of 99990217 is about 9999.5108380360. The cubic root of 99990217 is about 464.1437466465.

The spelling of 99990217 in words is "ninety-nine million, nine hundred ninety thousand, two hundred seventeen".