349580509 has 4 divisors (see below), whose sum is σ = 349629280. Its totient is φ = 349531740.

The previous prime is 349580507. The next prime is 349580533. The reversal of 349580509 is 905085943.

It is a happy number.

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: 905085943 = 131 ⋅6909053.

It is a cyclic number.

It is not a de Polignac number, because 349580509 - 2¹ = 349580507 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 (349580507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11289 + ... + 28750.

It is an arithmetic number, because the mean of its divisors is an integer number (87407320).

Almost surely, 2^349580509 is an apocalyptic number.

It is an amenable number.

349580509 is a deficient number, since it is larger than the sum of its proper divisors (48771).

349580509 is an equidigital number, since it uses as much as digits as its factorization.

349580509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48770.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 349580509 is about 18697.0722039575. The cubic root of 349580509 is about 704.4482103248.

The spelling of 349580509 in words is "three hundred forty-nine million, five hundred eighty thousand, five hundred nine".