9671591 has 2 divisors, whose sum is σ = 9671592. Its totient is φ = 9671590.

The previous prime is 9671581. The next prime is 9671593. The reversal of 9671591 is 1951769.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9671591 - 2⁶ = 9671527 is a prime.

Together with 9671593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9671593) 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, 4835795 + 4835796.

It is an arithmetic number, because the mean of its divisors is an integer number (4835796).

Almost surely, 2^9671591 is an apocalyptic number.

9671591 is a deficient number, since it is larger than the sum of its proper divisors (1).

9671591 is an equidigital number, since it uses as much as digits as its factorization.

9671591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17010, while the sum is 38.

The square root of 9671591 is about 3109.9181661259. The cubic root of 9671591 is about 213.0587170147.

The spelling of 9671591 in words is "nine million, six hundred seventy-one thousand, five hundred ninety-one".