8591131 has 2 divisors, whose sum is σ = 8591132. Its totient is φ = 8591130.

The previous prime is 8591129. The next prime is 8591183. The reversal of 8591131 is 1311958.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8591131 - 2¹ = 8591129 is a prime.

It is a super-2 number, since 2×8591131² = 147615063718322, which contains 22 as substring.

Together with 8591129, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 8591131.

It is not a weakly prime, because it can be changed into another prime (8591431) 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, 4295565 + 4295566.

It is an arithmetic number, because the mean of its divisors is an integer number (4295566).

Almost surely, 2^8591131 is an apocalyptic number.

8591131 is a deficient number, since it is larger than the sum of its proper divisors (1).

8591131 is an equidigital number, since it uses as much as digits as its factorization.

8591131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 28.

The square root of 8591131 is about 2931.0631177100. The cubic root of 8591131 is about 204.8095077551.

The spelling of 8591131 in words is "eight million, five hundred ninety-one thousand, one hundred thirty-one".