591340091 has 2 divisors, whose sum is σ = 591340092. Its totient is φ = 591340090.

The previous prime is 591340081. The next prime is 591340093. The reversal of 591340091 is 190043195.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-591340091 is a prime.

Together with 591340093, 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 (591340093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 295670045 + 295670046.

It is an arithmetic number, because the mean of its divisors is an integer number (295670046).

Almost surely, 2^591340091 is an apocalyptic number.

591340091 is a deficient number, since it is larger than the sum of its proper divisors (1).

591340091 is an equidigital number, since it uses as much as digits as its factorization.

591340091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 591340091 is about 24317.4852935085. The cubic root of 591340091 is about 839.3551792648.

The spelling of 591340091 in words is "five hundred ninety-one million, three hundred forty thousand, ninety-one".