9999894 has 32 divisors (see below), whose sum is σ = 21026304. Its totient is φ = 3164480.

The previous prime is 9999889. The next prime is 9999901. The reversal of 9999894 is 4989999.

It is a super-2 number, since 2×9999894² = 199995760022472, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31999 + ... + 32309.

It is an arithmetic number, because the mean of its divisors is an integer number (657072).

Almost surely, 2^9999894 is an apocalyptic number.

9999894 is an abundant number, since it is smaller than the sum of its proper divisors (11026410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9999894 is a wasteful number, since it uses less digits than its factorization.

9999894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572.

The product of its digits is 1889568, while the sum is 57.

The square root of 9999894 is about 3162.2609000524. The cubic root of 9999894 is about 215.4427077669.

The spelling of 9999894 in words is "nine million, nine hundred ninety-nine thousand, eight hundred ninety-four".