9990569 has 2 divisors, whose sum is σ = 9990570. Its totient is φ = 9990568.

The previous prime is 9990557. The next prime is 9990653. The reversal of 9990569 is 9650999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9517225 + 473344 = 3085^2 + 688^2 .

It is a cyclic number.

It is not a de Polignac number, because 9990569 - 2²⁰ = 8941993 is a prime.

It is a super-2 number, since 2×9990569² = 199622937887522, which contains 22 as substring.

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 (9990769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995284 + 4995285.

It is an arithmetic number, because the mean of its divisors is an integer number (4995285).

Almost surely, 2^9990569 is an apocalyptic number.

It is an amenable number.

9990569 is a deficient number, since it is larger than the sum of its proper divisors (1).

9990569 is an equidigital number, since it uses as much as digits as its factorization.

9990569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196830, while the sum is 47.

The square root of 9990569 is about 3160.7861363908. The cubic root of 9990569 is about 215.3757194553.

The spelling of 9990569 in words is "nine million, nine hundred ninety thousand, five hundred sixty-nine".