343681 has 4 divisors (see below), whose sum is σ = 370132. Its totient is φ = 317232.

The previous prime is 343667. The next prime is 343687. The reversal of 343681 is 186343.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 167281 + 176400 = 409^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 343681 - 2⁵ = 343649 is a prime.

It is a super-2 number, since 2×343681² = 236233259522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13206 + ... + 13231.

It is an arithmetic number, because the mean of its divisors is an integer number (92533).

2³⁴³⁶⁸¹ is an apocalyptic number.

It is an amenable number.

343681 is a deficient number, since it is larger than the sum of its proper divisors (26451).

343681 is a wasteful number, since it uses less digits than its factorization.

343681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26450.

The product of its digits is 1728, while the sum is 25.

The square root of 343681 is about 586.2431236270. The cubic root of 343681 is about 70.0462959051.

It can be divided in two parts, 343 and 681, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 343681 in words is "three hundred forty-three thousand, six hundred eighty-one".