12678109 has 8 divisors (see below), whose sum is σ = 13074048. Its totient is φ = 12287520.

The previous prime is 12678103. The next prime is 12678119. The reversal of 12678109 is 90187621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12678109 - 2¹¹ = 12676061 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 (12678103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3769 + ... + 6289.

It is an arithmetic number, because the mean of its divisors is an integer number (1634256).

Almost surely, 2^12678109 is an apocalyptic number.

It is an amenable number.

12678109 is a deficient number, since it is larger than the sum of its proper divisors (395939).

12678109 is a wasteful number, since it uses less digits than its factorization.

12678109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 12678109 is about 3560.6332301994. The cubic root of 12678109 is about 233.1765257095.

The spelling of 12678109 in words is "twelve million, six hundred seventy-eight thousand, one hundred nine".