12289717 has 4 divisors (see below), whose sum is σ = 13406976. Its totient is φ = 11172460.

The previous prime is 12289687. The next prime is 12289757. The reversal of 12289717 is 71798221.

12289717 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12289717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12289757) 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, 558613 + ... + 558634.

It is an arithmetic number, because the mean of its divisors is an integer number (3351744).

Almost surely, 2^12289717 is an apocalyptic number.

It is an amenable number.

12289717 is a deficient number, since it is larger than the sum of its proper divisors (1117259).

12289717 is a wasteful number, since it uses less digits than its factorization.

12289717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117258.

The product of its digits is 14112, while the sum is 37.

The square root of 12289717 is about 3505.6692656325. The cubic root of 12289717 is about 230.7706787630.

The spelling of 12289717 in words is "twelve million, two hundred eighty-nine thousand, seven hundred seventeen".