12319909 has 4 divisors (see below), whose sum is σ = 14079904. Its totient is φ = 10559916.

The previous prime is 12319907. The next prime is 12319913. The reversal of 12319909 is 90991321.

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: 90991321 = 61 ⋅1491661.

It is a cyclic number.

It is not a de Polignac number, because 12319909 - 2¹ = 12319907 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 (12319907) 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, 879987 + ... + 880000.

It is an arithmetic number, because the mean of its divisors is an integer number (3519976).

Almost surely, 2^12319909 is an apocalyptic number.

It is an amenable number.

12319909 is a deficient number, since it is larger than the sum of its proper divisors (1759995).

12319909 is an equidigital number, since it uses as much as digits as its factorization.

12319909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759994.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 12319909 is about 3509.9727919173. The cubic root of 12319909 is about 230.9595014052.

The spelling of 12319909 in words is "twelve million, three hundred nineteen thousand, nine hundred nine".