12809713 has 4 divisors (see below), whose sum is σ = 14639680. Its totient is φ = 10979748.

The previous prime is 12809711. The next prime is 12809717. The reversal of 12809713 is 31790821.

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: 31790821 = 61 ⋅521161.

It is a cyclic number.

It is not a de Polignac number, because 12809713 - 2¹ = 12809711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12809711) 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, 914973 + ... + 914986.

It is an arithmetic number, because the mean of its divisors is an integer number (3659920).

Almost surely, 2^12809713 is an apocalyptic number.

It is an amenable number.

12809713 is a deficient number, since it is larger than the sum of its proper divisors (1829967).

12809713 is an equidigital number, since it uses as much as digits as its factorization.

12809713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829966.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 12809713 is about 3579.0659395993. The cubic root of 12809713 is about 233.9805728143.

The spelling of 12809713 in words is "twelve million, eight hundred nine thousand, seven hundred thirteen".