9998773 has 4 divisors (see below), whose sum is σ = 10007820. Its totient is φ = 9989728.

The previous prime is 9998753. The next prime is 9998777. The reversal of 9998773 is 3778999.

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 can be written as a sum of positive squares in 2 ways, for example, as 8168164 + 1830609 = 2858^2 + 1353^2 .

It is a cyclic number.

It is not a de Polignac number, because 9998773 - 2⁵ = 9998741 is a prime.

It is an Ulam number.

It is a Duffinian number.

9998773 is a lucky number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 9998773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2590 + ... + 5167.

It is an arithmetic number, because the mean of its divisors is an integer number (2501955).

Almost surely, 2^9998773 is an apocalyptic number.

It is an amenable number.

9998773 is a deficient number, since it is larger than the sum of its proper divisors (9047).

9998773 is a wasteful number, since it uses less digits than its factorization.

9998773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9046.

The product of its digits is 857304, while the sum is 52.

The square root of 9998773 is about 3162.0836484824. The cubic root of 9998773 is about 215.4346570049.

The spelling of 9998773 in words is "nine million, nine hundred ninety-eight thousand, seven hundred seventy-three".