12340909 has 4 divisors (see below), whose sum is σ = 14103904. Its totient is φ = 10577916.

The previous prime is 12340907. The next prime is 12340919. The reversal of 12340909 is 90904321.

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: 90904321 = 17 ⋅5347313.

It is a cyclic number.

It is not a de Polignac number, because 12340909 - 2¹ = 12340907 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 (12340901) 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, 881487 + ... + 881500.

It is an arithmetic number, because the mean of its divisors is an integer number (3525976).

Almost surely, 2^12340909 is an apocalyptic number.

It is an amenable number.

12340909 is a deficient number, since it is larger than the sum of its proper divisors (1762995).

12340909 is an equidigital number, since it uses as much as digits as its factorization.

12340909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762994.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 12340909 is about 3512.9629943966. The cubic root of 12340909 is about 231.0906548726.

The spelling of 12340909 in words is "twelve million, three hundred forty thousand, nine hundred nine".