9428981 has 4 divisors (see below), whose sum is σ = 9445632. Its totient is φ = 9412332.

The previous prime is 9428963. The next prime is 9428989. The reversal of 9428981 is 1898249.

9428981 is digitally balanced in base 3, 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9428981 - 2⁶ = 9428917 is a prime.

It is a super-2 number, since 2×9428981² = 177811365396722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9428989) 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, 7445 + ... + 8618.

It is an arithmetic number, because the mean of its divisors is an integer number (2361408).

Almost surely, 2^9428981 is an apocalyptic number.

It is an amenable number.

9428981 is a deficient number, since it is larger than the sum of its proper divisors (16651).

9428981 is a wasteful number, since it uses less digits than its factorization.

9428981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16650.

The product of its digits is 41472, while the sum is 41.

The square root of 9428981 is about 3070.6645860465. The cubic root of 9428981 is about 211.2620972730.

The spelling of 9428981 in words is "nine million, four hundred twenty-eight thousand, nine hundred eighty-one".