343403513 has 2 divisors, whose sum is σ = 343403514. Its totient is φ = 343403512.

The previous prime is 343403509. The next prime is 343403597. The reversal of 343403513 is 315304343.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237560569 + 105842944 = 15413^2 + 10288^2 .

It is a cyclic number.

It is not a de Polignac number, because 343403513 - 2² = 343403509 is a prime.

It is not a weakly prime, because it can be changed into another prime (343403503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171701756 + 171701757.

It is an arithmetic number, because the mean of its divisors is an integer number (171701757).

Almost surely, 2^343403513 is an apocalyptic number.

It is an amenable number.

343403513 is a deficient number, since it is larger than the sum of its proper divisors (1).

343403513 is an equidigital number, since it uses as much as digits as its factorization.

343403513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 26.

The square root of 343403513 is about 18531.1498024273. The cubic root of 343403513 is about 700.2743910676.

Adding to 343403513 its reverse (315304343), we get a palindrome (658707856).

The spelling of 343403513 in words is "three hundred forty-three million, four hundred three thousand, five hundred thirteen".