9438921 has 12 divisors (see below), whose sum is σ = 13698048. Its totient is φ = 6263064.

The previous prime is 9438907. The next prime is 9438931. The reversal of 9438921 is 1298349.

It is not a de Polignac number, because 9438921 - 2¹⁵ = 9406153 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9438931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 345 + ... + 4358.

It is an arithmetic number, because the mean of its divisors is an integer number (1141504).

Almost surely, 2^9438921 is an apocalyptic number.

It is an amenable number.

9438921 is a deficient number, since it is larger than the sum of its proper divisors (4259127).

9438921 is a wasteful number, since it uses less digits than its factorization.

9438921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4932 (or 4929 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 9438921 is about 3072.2827018359. The cubic root of 9438921 is about 211.3363084651.

The spelling of 9438921 in words is "nine million, four hundred thirty-eight thousand, nine hundred twenty-one".