349269509 has 4 divisors (see below), whose sum is σ = 349836204. Its totient is φ = 348702816.

The previous prime is 349269499. The next prime is 349269511. The reversal of 349269509 is 905962943.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 905962943 = 499 ⋅1815557.

It can be written as a sum of positive squares in 2 ways, for example, as 65448100 + 283821409 = 8090^2 + 16847^2 .

It is a cyclic number.

It is not a de Polignac number, because 349269509 - 2⁸ = 349269253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349269589) 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, 282422 + ... + 283655.

It is an arithmetic number, because the mean of its divisors is an integer number (87459051).

Almost surely, 2^349269509 is an apocalyptic number.

It is an amenable number.

349269509 is a deficient number, since it is larger than the sum of its proper divisors (566695).

349269509 is an equidigital number, since it uses as much as digits as its factorization.

349269509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566694.

The product of its (nonzero) digits is 524880, while the sum is 47.

The square root of 349269509 is about 18688.7535432409. The cubic root of 349269509 is about 704.2392471168.

The spelling of 349269509 in words is "three hundred forty-nine million, two hundred sixty-nine thousand, five hundred nine".