9998305 has 4 divisors (see below), whose sum is σ = 11997972. Its totient is φ = 7998640.

The previous prime is 9998281. The next prime is 9998309. The reversal of 9998305 is 5038999.

9998305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4648336 + 5349969 = 2156^2 + 2313^2 .

It is not a de Polignac number, because 9998305 - 2⁵ = 9998273 is a prime.

It is a super-2 number, since 2×9998305² = 199932205746050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9998309) 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, 999826 + ... + 999835.

It is an arithmetic number, because the mean of its divisors is an integer number (2999493).

Almost surely, 2^9998305 is an apocalyptic number.

It is an amenable number.

9998305 is a deficient number, since it is larger than the sum of its proper divisors (1999667).

9998305 is a wasteful number, since it uses less digits than its factorization.

9998305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999666.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 9998305 is about 3162.0096457791. The cubic root of 9998305 is about 215.4312957594.

The spelling of 9998305 in words is "nine million, nine hundred ninety-eight thousand, three hundred five".