343381 has 2 divisors, whose sum is σ = 343382. Its totient is φ = 343380.

The previous prime is 343379. The next prime is 343391. The reversal of 343381 is 183343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 342225 + 1156 = 585^2 + 34^2 .

It is an emirp because it is prime and its reverse (183343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 343381 - 2¹ = 343379 is a prime.

It is a super-2 number, since 2×343381² = 235821022322, which contains 22 as substring.

Together with 343379, it forms a pair of twin primes.

It is an Ulam number.

It is equal to p₂₉₄₅₂ and since 343381 and 29452 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 (343391) 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, 171690 + 171691.

It is an arithmetic number, because the mean of its divisors is an integer number (171691).

2³⁴³³⁸¹ is an apocalyptic number.

It is an amenable number.

343381 is a deficient number, since it is larger than the sum of its proper divisors (1).

343381 is an equidigital number, since it uses as much as digits as its factorization.

343381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 22.

The square root of 343381 is about 585.9872012254. The cubic root of 343381 is about 70.0259087767.

The spelling of 343381 in words is "three hundred forty-three thousand, three hundred eighty-one".