591391 has 2 divisors, whose sum is σ = 591392. Its totient is φ = 591390.

The previous prime is 591377. The next prime is 591403. The reversal of 591391 is 193195.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 591391 - 2¹⁹ = 67103 is a prime.

591391 is a lucky number.

It is equal to p₄₈₄₄₈ and since 591391 and 48448 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (591301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 295695 + 295696.

It is an arithmetic number, because the mean of its divisors is an integer number (295696).

2⁵⁹¹³⁹¹ is an apocalyptic number.

591391 is a deficient number, since it is larger than the sum of its proper divisors (1).

591391 is an equidigital number, since it uses as much as digits as its factorization.

591391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1215, while the sum is 28.

The square root of 591391 is about 769.0195056044. The cubic root of 591391 is about 83.9379265521.

The spelling of 591391 in words is "five hundred ninety-one thousand, three hundred ninety-one".