343591 has 2 divisors, whose sum is σ = 343592. Its totient is φ = 343590.

The previous prime is 343589. The next prime is 343601. The reversal of 343591 is 195343.

It is a weak prime.

It is an emirp because it is prime and its reverse (195343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 343591 - 2¹ = 343589 is a prime.

Together with 343589, it forms a pair of twin primes.

343591 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343531) 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, 171795 + 171796.

It is an arithmetic number, because the mean of its divisors is an integer number (171796).

2³⁴³⁵⁹¹ is an apocalyptic number.

343591 is a deficient number, since it is larger than the sum of its proper divisors (1).

343591 is an equidigital number, since it uses as much as digits as its factorization.

343591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 25.

The square root of 343591 is about 586.1663586389. The cubic root of 343591 is about 70.0401810127.

The spelling of 343591 in words is "three hundred forty-three thousand, five hundred ninety-one".