9998783 has 4 divisors (see below), whose sum is σ = 10005240. Its totient is φ = 9992328.

The previous prime is 9998777. The next prime is 9998797. The reversal of 9998783 is 3878999.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9998783 - 2⁶ = 9998719 is a prime.

It is a super-2 number, since 2×9998783² = 199951322962178, which 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 (9998743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641 + ... + 4517.

It is an arithmetic number, because the mean of its divisors is an integer number (2501310).

Almost surely, 2^9998783 is an apocalyptic number.

9998783 is a deficient number, since it is larger than the sum of its proper divisors (6457).

9998783 is a wasteful number, since it uses less digits than its factorization.

9998783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456.

The product of its digits is 979776, while the sum is 53.

The square root of 9998783 is about 3162.0852297179. The cubic root of 9998783 is about 215.4347288252.

The spelling of 9998783 in words is "nine million, nine hundred ninety-eight thousand, seven hundred eighty-three".