9428621 has 2 divisors, whose sum is σ = 9428622. Its totient is φ = 9428620.

The previous prime is 9428611. The next prime is 9428633. The reversal of 9428621 is 1268249.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9424900 + 3721 = 3070^2 + 61^2 .

It is a cyclic number.

It is not a de Polignac number, because 9428621 - 2¹⁰ = 9427597 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9428611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4714310 + 4714311.

It is an arithmetic number, because the mean of its divisors is an integer number (4714311).

Almost surely, 2^9428621 is an apocalyptic number.

It is an amenable number.

9428621 is a deficient number, since it is larger than the sum of its proper divisors (1).

9428621 is an equidigital number, since it uses as much as digits as its factorization.

9428621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 9428621 is about 3070.6059662549. The cubic root of 9428621 is about 211.2594085652.

Adding to 9428621 its sum of digits (32), we get a triangular number (9428653 = T₄₃₄₂).

The spelling of 9428621 in words is "nine million, four hundred twenty-eight thousand, six hundred twenty-one".