9641921 has 2 divisors, whose sum is σ = 9641922. Its totient is φ = 9641920.

The previous prime is 9641917. The next prime is 9641959. The reversal of 9641921 is 1291469.

9641921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7639696 + 2002225 = 2764^2 + 1415^2 .

It is a cyclic number.

It is not a de Polignac number, because 9641921 - 2² = 9641917 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9641971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4820960 + 4820961.

It is an arithmetic number, because the mean of its divisors is an integer number (4820961).

Almost surely, 2^9641921 is an apocalyptic number.

It is an amenable number.

9641921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9641921 is an equidigital number, since it uses as much as digits as its factorization.

9641921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 32.

The square root of 9641921 is about 3105.1442800617. The cubic root of 9641921 is about 212.8406237221.

The spelling of 9641921 in words is "nine million, six hundred forty-one thousand, nine hundred twenty-one".