340240343 has 4 divisors (see below), whose sum is σ = 340306320. Its totient is φ = 340174368.

The previous prime is 340240319. The next prime is 340240349. The reversal of 340240343 is 343042043.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 343042043 = 1523 ⋅225241.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340240343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340240349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24530 + ... + 35807.

It is an arithmetic number, because the mean of its divisors is an integer number (85076580).

Almost surely, 2^340240343 is an apocalyptic number.

340240343 is a deficient number, since it is larger than the sum of its proper divisors (65977).

340240343 is an equidigital number, since it uses as much as digits as its factorization.

340240343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65976.

The product of its (nonzero) digits is 3456, while the sum is 23.

The square root of 340240343 is about 18445.6049778802. The cubic root of 340240343 is about 698.1176249419.

Adding to 340240343 its reverse (343042043), we get a palindrome (683282386).

The spelling of 340240343 in words is "three hundred forty million, two hundred forty thousand, three hundred forty-three".