12678909 has 8 divisors (see below), whose sum is σ = 17795040. Its totient is φ = 8007696.

The previous prime is 12678899. The next prime is 12678929. The reversal of 12678909 is 90987621.

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

It is not a de Polignac number, because 12678909 - 2⁴ = 12678893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12678929) 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, 111162 + ... + 111275.

It is an arithmetic number, because the mean of its divisors is an integer number (2224380).

Almost surely, 2^12678909 is an apocalyptic number.

12678909 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12678909 is a deficient number, since it is larger than the sum of its proper divisors (5116131).

12678909 is a wasteful number, since it uses less digits than its factorization.

12678909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222459.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 12678909 is about 3560.7455679956. The cubic root of 12678909 is about 233.1814301554.

The spelling of 12678909 in words is "twelve million, six hundred seventy-eight thousand, nine hundred nine".