343420513 has 4 divisors (see below), whose sum is σ = 343955248. Its totient is φ = 342885780.

The previous prime is 343420507. The next prime is 343420577. The reversal of 343420513 is 315024343.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 315024343 = 523 ⋅602341.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343420513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343420313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266403 + ... + 267688.

It is an arithmetic number, because the mean of its divisors is an integer number (85988812).

Almost surely, 2^343420513 is an apocalyptic number.

It is an amenable number.

343420513 is a deficient number, since it is larger than the sum of its proper divisors (534735).

343420513 is an equidigital number, since it uses as much as digits as its factorization.

343420513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534734.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 343420513 is about 18531.6084838850. The cubic root of 343420513 is about 700.2859464417.

Adding to 343420513 its reverse (315024343), we get a palindrome (658444856).

The spelling of 343420513 in words is "three hundred forty-three million, four hundred twenty thousand, five hundred thirteen".