9894723992 has 16 divisors (see below), whose sum is σ = 18725997960. Its totient is φ = 4901124544.

The previous prime is 9894723973. The next prime is 9894724003. The reversal of 9894723992 is 2993274989.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5778773 + ... + 5780484.

Almost surely, 2^9894723992 is an apocalyptic number.

It is an amenable number.

9894723992 is a deficient number, since it is larger than the sum of its proper divisors (8831273968).

9894723992 is a wasteful number, since it uses less digits than its factorization.

9894723992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11559370 (or 11559366 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 62.

The square root of 9894723992 is about 99472.2272395667. The cubic root of 9894723992 is about 2146.8476602191.

The spelling of 9894723992 in words is "nine billion, eight hundred ninety-four million, seven hundred twenty-three thousand, nine hundred ninety-two".