343400243 has 4 divisors (see below), whose sum is σ = 361473960. Its totient is φ = 325326528.

The previous prime is 343400209. The next prime is 343400261. The reversal of 343400243 is 342004343.

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: 342004343 = 73 ⋅4684991.

It is a cyclic number.

It is not a de Polignac number, because 343400243 - 2¹⁶ = 343334707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343400203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9036830 + ... + 9036867.

It is an arithmetic number, because the mean of its divisors is an integer number (90368490).

Almost surely, 2^343400243 is an apocalyptic number.

343400243 is a deficient number, since it is larger than the sum of its proper divisors (18073717).

343400243 is a wasteful number, since it uses less digits than its factorization.

343400243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18073716.

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

The square root of 343400243 is about 18531.0615723978. The cubic root of 343400243 is about 700.2721683137.

Adding to 343400243 its reverse (342004343), we get a palindrome (685404586).

The spelling of 343400243 in words is "three hundred forty-three million, four hundred thousand, two hundred forty-three".