349112909 has 4 divisors (see below), whose sum is σ = 357627900. Its totient is φ = 340597920.

The previous prime is 349112903. The next prime is 349112921. The reversal of 349112909 is 909211943.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 909211943 = 97 ⋅9373319.

It can be written as a sum of positive squares in 2 ways, for example, as 211120900 + 137992009 = 14530^2 + 11747^2 .

It is a cyclic number.

It is not a de Polignac number, because 349112909 - 2¹² = 349108813 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 (349112903) 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, 4257434 + ... + 4257515.

It is an arithmetic number, because the mean of its divisors is an integer number (89406975).

Almost surely, 2^349112909 is an apocalyptic number.

It is an amenable number.

349112909 is a deficient number, since it is larger than the sum of its proper divisors (8514991).

349112909 is an equidigital number, since it uses as much as digits as its factorization.

349112909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8514990.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 349112909 is about 18684.5633879949. The cubic root of 349112909 is about 704.1339794560.

The spelling of 349112909 in words is "three hundred forty-nine million, one hundred twelve thousand, nine hundred nine".