8975621 has 2 divisors, whose sum is σ = 8975622. Its totient is φ = 8975620.

The previous prime is 8975579. The next prime is 8975633. The reversal of 8975621 is 1265798.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7896100 + 1079521 = 2810^2 + 1039^2 .

It is a cyclic number.

It is not a de Polignac number, because 8975621 - 2¹⁰ = 8974597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8975641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4487810 + 4487811.

It is an arithmetic number, because the mean of its divisors is an integer number (4487811).

Almost surely, 2^8975621 is an apocalyptic number.

It is an amenable number.

8975621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8975621 is an equidigital number, since it uses as much as digits as its factorization.

8975621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 8975621 is about 2995.9340780464. The cubic root of 8975621 is about 207.8203963043.

The spelling of 8975621 in words is "eight million, nine hundred seventy-five thousand, six hundred twenty-one".