99190009 has 4 divisors (see below), whose sum is σ = 99241204. Its totient is φ = 99138816.

The previous prime is 99190001. The next prime is 99190027. The reversal of 99190009 is 90009199.

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

It can be written as a sum of positive squares in 2 ways, for example, as 52881984 + 46308025 = 7272^2 + 6805^2 .

It is a cyclic number.

It is not a de Polignac number, because 99190009 - 2³ = 99190001 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 99190009.

It is not an unprimeable number, because it can be changed into a prime (99190001) 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, 22572 + ... + 26605.

It is an arithmetic number, because the mean of its divisors is an integer number (24810301).

Almost surely, 2^99190009 is an apocalyptic number.

It is an amenable number.

99190009 is a deficient number, since it is larger than the sum of its proper divisors (51195).

99190009 is a wasteful number, since it uses less digits than its factorization.

99190009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51194.

The product of its (nonzero) digits is 6561, while the sum is 37.

The square root of 99190009 is about 9959.4181054919. The cubic root of 99190009 is about 462.9022693490.

The spelling of 99190009 in words is "ninety-nine million, one hundred ninety thousand, nine".