12469109 has 4 divisors (see below), whose sum is σ = 13202604. Its totient is φ = 11735616.

The previous prime is 12469103. The next prime is 12469129. The reversal of 12469109 is 90196421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90196421 = 7 ⋅12885203.

It can be written as a sum of positive squares in 2 ways, for example, as 8151025 + 4318084 = 2855^2 + 2078^2 .

It is a cyclic number.

It is not a de Polignac number, because 12469109 - 2²⁰ = 11420533 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 (12469103) 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, 366722 + ... + 366755.

It is an arithmetic number, because the mean of its divisors is an integer number (3300651).

Almost surely, 2^12469109 is an apocalyptic number.

It is an amenable number.

12469109 is a deficient number, since it is larger than the sum of its proper divisors (733495).

12469109 is an equidigital number, since it uses as much as digits as its factorization.

12469109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733494.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 12469109 is about 3531.1625564395. The cubic root of 12469109 is about 231.8881062186. Note that the first 3 decimals are identical.

The spelling of 12469109 in words is "twelve million, four hundred sixty-nine thousand, one hundred nine".