9638591 has 2 divisors, whose sum is σ = 9638592. Its totient is φ = 9638590.

The previous prime is 9638557. The next prime is 9638597. The reversal of 9638591 is 1958369.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9638591 - 2¹⁰ = 9637567 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 (9638597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4819295 + 4819296.

It is an arithmetic number, because the mean of its divisors is an integer number (4819296).

Almost surely, 2^9638591 is an apocalyptic number.

9638591 is a deficient number, since it is larger than the sum of its proper divisors (1).

9638591 is an equidigital number, since it uses as much as digits as its factorization.

9638591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 41.

The square root of 9638591 is about 3104.6080267886. The cubic root of 9638591 is about 212.8161182013.

The spelling of 9638591 in words is "nine million, six hundred thirty-eight thousand, five hundred ninety-one".