99999017 has 4 divisors (see below), whose sum is σ = 100577220. Its totient is φ = 99420816.

The previous prime is 99998999. The next prime is 99999043. The reversal of 99999017 is 71099999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71099999 = 4133 ⋅17203.

It can be written as a sum of positive squares in 2 ways, for example, as 53158681 + 46840336 = 7291^2 + 6844^2 .

It is a cyclic number.

It is not a de Polignac number, because 99999017 - 2⁶ = 99998953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99999017.

It is not an unprimeable number, because it can be changed into a prime (99999077) 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 3 ways as a sum of consecutive naturals, for example, 288842 + ... + 289187.

It is an arithmetic number, because the mean of its divisors is an integer number (25144305).

Almost surely, 2^99999017 is an apocalyptic number.

It is an amenable number.

99999017 is a deficient number, since it is larger than the sum of its proper divisors (578203).

99999017 is a wasteful number, since it uses less digits than its factorization.

99999017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578202.

The product of its (nonzero) digits is 413343, while the sum is 53.

The square root of 99999017 is about 9999.9508498792. The cubic root of 99999017 is about 464.1573624624.

The spelling of 99999017 in words is "ninety-nine million, nine hundred ninety-nine thousand, seventeen".