99170999 has 4 divisors (see below), whose sum is σ = 99615936. Its totient is φ = 98726064.

The previous prime is 99170941. The next prime is 99171019. The reversal of 99170999 is 99907199.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99170999 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 99170999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99170399) 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, 222134 + ... + 222579.

It is an arithmetic number, because the mean of its divisors is an integer number (24903984).

Almost surely, 2^99170999 is an apocalyptic number.

99170999 is a deficient number, since it is larger than the sum of its proper divisors (444937).

99170999 is a wasteful number, since it uses less digits than its factorization.

99170999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444936.

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

The square root of 99170999 is about 9958.4636867340. The cubic root of 99170999 is about 462.8726953544.

The spelling of 99170999 in words is "ninety-nine million, one hundred seventy thousand, nine hundred ninety-nine".