12747109 has 8 divisors (see below), whose sum is σ = 13090680. Its totient is φ = 12408000.

The previous prime is 12747047. The next prime is 12747121. The reversal of 12747109 is 90174721.

It can be written as a sum of positive squares in 4 ways, for example, as 476100 + 12271009 = 690^2 + 3503^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12747109 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 (12747139) 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, 5127 + ... + 7195.

It is an arithmetic number, because the mean of its divisors is an integer number (1636335).

Almost surely, 2^12747109 is an apocalyptic number.

It is an amenable number.

12747109 is a deficient number, since it is larger than the sum of its proper divisors (343571).

12747109 is a wasteful number, since it uses less digits than its factorization.

12747109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 12747109 is about 3570.3093703487. The cubic root of 12747109 is about 233.5987779558.

The spelling of 12747109 in words is "twelve million, seven hundred forty-seven thousand, one hundred nine".