98909990999 has 4 divisors (see below), whose sum is σ = 98912618400. Its totient is φ = 98907363600.

The previous prime is 98909990987. The next prime is 98909991017. The reversal of 98909990999 is 99909990989.

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

It is a cyclic number.

It is not a de Polignac number, because 98909990999 - 2⁸ = 98909990743 is a prime.

It is a super-2 number, since 2×98909990999² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98909990099) 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, 1256399 + ... + 1332800.

It is an arithmetic number, because the mean of its divisors is an integer number (24728154600).

Almost surely, 2^98909990999 is an apocalyptic number.

98909990999 is a deficient number, since it is larger than the sum of its proper divisors (2627401).

98909990999 is a wasteful number, since it uses less digits than its factorization.

98909990999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627400.

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

The spelling of 98909990999 in words is "ninety-eight billion, nine hundred nine million, nine hundred ninety thousand, nine hundred ninety-nine".