9998545 has 16 divisors (see below), whose sum is σ = 12377088. Its totient is φ = 7750080.

The previous prime is 9998543. The next prime is 9998557. The reversal of 9998545 is 5458999.

It is not a de Polignac number, because 9998545 - 2¹ = 9998543 is a prime.

It is a Duffinian number.

Its product of digits (583200) is a multiple of the sum of its prime divisors (480).

It is not an unprimeable number, because it can be changed into a prime (9998543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36760 + ... + 37030.

It is an arithmetic number, because the mean of its divisors is an integer number (773568).

Almost surely, 2^9998545 is an apocalyptic number.

It is an amenable number.

9998545 is a deficient number, since it is larger than the sum of its proper divisors (2378543).

9998545 is a wasteful number, since it uses less digits than its factorization.

9998545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480.

The product of its digits is 583200, while the sum is 49.

The square root of 9998545 is about 3162.0475960997. The cubic root of 9998545 is about 215.4330194881.

The spelling of 9998545 in words is "nine million, nine hundred ninety-eight thousand, five hundred forty-five".