9894033221 has 4 divisors (see below), whose sum is σ = 9896352972. Its totient is φ = 9891713472.

The previous prime is 9894033199. The next prime is 9894033241. The reversal of 9894033221 is 1223304989.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1191009121 + 8703024100 = 34511^2 + 93290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9894033221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9894033241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1153466 + ... + 1162011.

It is an arithmetic number, because the mean of its divisors is an integer number (2474088243).

Almost surely, 2^9894033221 is an apocalyptic number.

It is an amenable number.

9894033221 is a deficient number, since it is larger than the sum of its proper divisors (2319751).

9894033221 is a wasteful number, since it uses less digits than its factorization.

9894033221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319750.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 9894033221 is about 99468.7549987432. The cubic root of 9894033221 is about 2146.7977004420.

The spelling of 9894033221 in words is "nine billion, eight hundred ninety-four million, thirty-three thousand, two hundred twenty-one".