989996894 has 4 divisors (see below), whose sum is σ = 1484995344. Its totient is φ = 494998446.

The previous prime is 989996893. The next prime is 989996923. The reversal of 989996894 is 498699989.

989996894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 498699989 = 97 ⋅5141237.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989996893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247499222 + ... + 247499225.

It is an arithmetic number, because the mean of its divisors is an integer number (371248836).

Almost surely, 2^989996894 is an apocalyptic number.

989996894 is a deficient number, since it is larger than the sum of its proper divisors (494998450).

989996894 is a wasteful number, since it uses less digits than its factorization.

989996894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494998449.

The product of its digits is 90699264, while the sum is 71.

The square root of 989996894 is about 31464.2160874858. The cubic root of 989996894 is about 996.6544511179.

The spelling of 989996894 in words is "nine hundred eighty-nine million, nine hundred ninety-six thousand, eight hundred ninety-four".