9998775 has 24 divisors (see below), whose sum is σ = 18369360. Its totient is φ = 5332320.

The previous prime is 9998753. The next prime is 9998777. The reversal of 9998775 is 5778999.

9998775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9998775 - 2⁵ = 9998743 is a prime.

It is an Ulam number.

9998775 is a lucky number.

It is a nialpdrome in base 10.

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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6732 + ... + 8081.

It is an arithmetic number, because the mean of its divisors is an integer number (765390).

Almost surely, 2^9998775 is an apocalyptic number.

9998775 is a deficient number, since it is larger than the sum of its proper divisors (8370585).

9998775 is a wasteful number, since it uses less digits than its factorization.

9998775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14832 (or 14821 counting only the distinct ones).

The product of its digits is 1428840, while the sum is 54.

The square root of 9998775 is about 3162.0839647296. The cubic root of 9998775 is about 215.4346713690.

The spelling of 9998775 in words is "nine million, nine hundred ninety-eight thousand, seven hundred seventy-five".