9999098999 has 4 divisors (see below), whose sum is σ = 10003947936. Its totient is φ = 9994250064.

The previous prime is 9999098971. The next prime is 9999099017. The reversal of 9999098999 is 9998909999.

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-9999098999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999098299) 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, 2421374 + ... + 2425499.

It is an arithmetic number, because the mean of its divisors is an integer number (2500986984).

Almost surely, 2^9999098999 is an apocalyptic number.

9999098999 is a deficient number, since it is larger than the sum of its proper divisors (4848937).

9999098999 is a wasteful number, since it uses less digits than its factorization.

9999098999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4848936.

The product of its (nonzero) digits is 344373768, while the sum is 80.

The square root of 9999098999 is about 99995.4948935201. The cubic root of 9999098999 is about 2154.3699831615.

The spelling of 9999098999 in words is "nine billion, nine hundred ninety-nine million, ninety-eight thousand, nine hundred ninety-nine".