9641591 has 2 divisors, whose sum is σ = 9641592. Its totient is φ = 9641590.

The previous prime is 9641579. The next prime is 9641617. The reversal of 9641591 is 1951469.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9641591 - 2¹⁴ = 9625207 is a prime.

It is a super-2 number, since 2×9641591² = 185920554022562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9641491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4820795 + 4820796.

It is an arithmetic number, because the mean of its divisors is an integer number (4820796).

Almost surely, 2^9641591 is an apocalyptic number.

9641591 is a deficient number, since it is larger than the sum of its proper divisors (1).

9641591 is an equidigital number, since it uses as much as digits as its factorization.

9641591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 35.

The square root of 9641591 is about 3105.0911419796. The cubic root of 9641591 is about 212.8381954989.

The spelling of 9641591 in words is "nine million, six hundred forty-one thousand, five hundred ninety-one".