343643 has 8 divisors (see below), whose sum is σ = 365568. Its totient is φ = 322344.

The previous prime is 343639. The next prime is 343649. The reversal of 343643 is 346343.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 343643 - 2² = 343639 is a prime.

It is a super-2 number, since 2×343643² = 236181022898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 343643.

It is not an unprimeable number, because it can be changed into a prime (343649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1430 + ... + 1652.

It is an arithmetic number, because the mean of its divisors is an integer number (45696).

2³⁴³⁶⁴³ is an apocalyptic number.

343643 is a deficient number, since it is larger than the sum of its proper divisors (21925).

343643 is a wasteful number, since it uses less digits than its factorization.

343643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313.

The product of its digits is 2592, while the sum is 23.

The square root of 343643 is about 586.2107129693. The cubic root of 343643 is about 70.0437141919.

343643 divided by its sum of digits (23) gives a palindrome (14941).

Adding to 343643 its reverse (346343), we get a palindrome (689986).

The spelling of 343643 in words is "three hundred forty-three thousand, six hundred forty-three".