348005509 has 4 divisors (see below), whose sum is σ = 348276780. Its totient is φ = 347734240.

The previous prime is 348005503. The next prime is 348005513. The reversal of 348005509 is 905500843.

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

It can be written as a sum of positive squares in 2 ways, for example, as 250430625 + 97574884 = 15825^2 + 9878^2 .

It is a cyclic number.

It is not a de Polignac number, because 348005509 - 2⁵ = 348005477 is a prime.

It is a super-2 number, since 2×348005509² = 242215668588698162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (348005503) 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, 133702 + ... + 136279.

It is an arithmetic number, because the mean of its divisors is an integer number (87069195).

Almost surely, 2^348005509 is an apocalyptic number.

It is an amenable number.

348005509 is a deficient number, since it is larger than the sum of its proper divisors (271271).

348005509 is a wasteful number, since it uses less digits than its factorization.

348005509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271270.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 348005509 is about 18654.9057622921. The cubic root of 348005509 is about 703.3886772160.

The spelling of 348005509 in words is "three hundred forty-eight million, five thousand, five hundred nine".