343121303 has 4 divisors (see below), whose sum is σ = 392138640. Its totient is φ = 294103968.

The previous prime is 343121297. The next prime is 343121329. The reversal of 343121303 is 303121343.

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

It is a cyclic number.

It is not a de Polignac number, because 343121303 - 2¹⁴ = 343104919 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 (343121393) 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, 24508658 + ... + 24508671.

It is an arithmetic number, because the mean of its divisors is an integer number (98034660).

Almost surely, 2^343121303 is an apocalyptic number.

343121303 is a deficient number, since it is larger than the sum of its proper divisors (49017337).

343121303 is an equidigital number, since it uses as much as digits as its factorization.

343121303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49017336.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 343121303 is about 18523.5337611375. The cubic root of 343121303 is about 700.0825093218.

Adding to 343121303 its reverse (303121343), we get a palindrome (646242646).

The spelling of 343121303 in words is "three hundred forty-three million, one hundred twenty-one thousand, three hundred three".