91063571 has 2 divisors, whose sum is σ = 91063572. Its totient is φ = 91063570.

The previous prime is 91063559. The next prime is 91063573. The reversal of 91063571 is 17536019.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91063571 is a prime.

Together with 91063573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91063573) 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, 45531785 + 45531786.

It is an arithmetic number, because the mean of its divisors is an integer number (45531786).

Almost surely, 2^91063571 is an apocalyptic number.

91063571 is a deficient number, since it is larger than the sum of its proper divisors (1).

91063571 is an equidigital number, since it uses as much as digits as its factorization.

91063571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 91063571 is about 9542.7234582167. The cubic root of 91063571 is about 449.8988595743.

The spelling of 91063571 in words is "ninety-one million, sixty-three thousand, five hundred seventy-one".