591091 has 2 divisors, whose sum is σ = 591092. Its totient is φ = 591090.

The previous prime is 591089. The next prime is 591113. The reversal of 591091 is 190195.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 591091 - 2¹ = 591089 is a prime.

Together with 591089, it forms a pair of twin primes.

It is a plaindrome in base 14.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (591061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 295545 + 295546.

It is an arithmetic number, because the mean of its divisors is an integer number (295546).

2⁵⁹¹⁰⁹¹ is an apocalyptic number.

591091 is a deficient number, since it is larger than the sum of its proper divisors (1).

591091 is an equidigital number, since it uses as much as digits as its factorization.

591091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 591091 is about 768.8244272914. The cubic root of 591091 is about 83.9237308467.

The spelling of 591091 in words is "five hundred ninety-one thousand, ninety-one".