12289917 has 8 divisors (see below), whose sum is σ = 16516096. Its totient is φ = 8128512.

The previous prime is 12289909. The next prime is 12289931. The reversal of 12289917 is 71998221.

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

It is not a de Polignac number, because 12289917 - 2³ = 12289909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12289117) 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, 15748 + ... + 16509.

It is an arithmetic number, because the mean of its divisors is an integer number (2064512).

Almost surely, 2^12289917 is an apocalyptic number.

It is an amenable number.

12289917 is a deficient number, since it is larger than the sum of its proper divisors (4226179).

12289917 is a wasteful number, since it uses less digits than its factorization.

12289917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32387.

The product of its digits is 18144, while the sum is 39.

The square root of 12289917 is about 3505.6977907401. The cubic root of 12289917 is about 230.7719305923.

The spelling of 12289917 in words is "twelve million, two hundred eighty-nine thousand, nine hundred seventeen".