340591 has 2 divisors, whose sum is σ = 340592. Its totient is φ = 340590.

The previous prime is 340583. The next prime is 340601. The reversal of 340591 is 195043.

It is a weak prime.

It is an emirp because it is prime and its reverse (195043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340591 - 2³ = 340583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340541) 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, 170295 + 170296.

It is an arithmetic number, because the mean of its divisors is an integer number (170296).

2³⁴⁰⁵⁹¹ is an apocalyptic number.

340591 is a deficient number, since it is larger than the sum of its proper divisors (1).

340591 is an equidigital number, since it uses as much as digits as its factorization.

340591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 340591 is about 583.6017477698. The cubic root of 340591 is about 69.8357372899.

The spelling of 340591 in words is "three hundred forty thousand, five hundred ninety-one".