999983894 has 32 divisors (see below), whose sum is σ = 1954725696. Its totient is φ = 372326400.

The previous prime is 999983893. The next prime is 999983921. The reversal of 999983894 is 498389999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999983893) 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, 158507 + ... + 164694.

It is an arithmetic number, because the mean of its divisors is an integer number (61085178).

Almost surely, 2^999983894 is an apocalyptic number.

999983894 is a deficient number, since it is larger than the sum of its proper divisors (954741802).

999983894 is a wasteful number, since it uses less digits than its factorization.

999983894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323240.

The product of its digits is 45349632, while the sum is 68.

The square root of 999983894 is about 31622.5219424384. The cubic root of 999983894 is about 999.9946313045.

The spelling of 999983894 in words is "nine hundred ninety-nine million, nine hundred eighty-three thousand, eight hundred ninety-four".