9998515 has 4 divisors (see below), whose sum is σ = 11998224. Its totient is φ = 7998808.

The previous prime is 9998479. The next prime is 9998539. The reversal of 9998515 is 5158999.

9998515 is digitally balanced in base 3, 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9998515 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999847 + ... + 999856.

It is an arithmetic number, because the mean of its divisors is an integer number (2999556).

Almost surely, 2^9998515 is an apocalyptic number.

9998515 is a deficient number, since it is larger than the sum of its proper divisors (1999709).

9998515 is a wasteful number, since it uses less digits than its factorization.

9998515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999708.

The product of its digits is 145800, while the sum is 46.

The square root of 9998515 is about 3162.0428523345. The cubic root of 9998515 is about 215.4328040235.

It can be divided in two parts, 99985 and 15, that added together give a 5-th power (100000 = 10⁵).

The spelling of 9998515 in words is "nine million, nine hundred ninety-eight thousand, five hundred fifteen".