12917997 has 12 divisors (see below), whose sum is σ = 19056960. Its totient is φ = 8428488.

The previous prime is 12917987. The next prime is 12917999. The reversal of 12917997 is 79971921.

It is not a de Polignac number, because 12917997 - 2⁴ = 12917981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12917999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14847 + ... + 15692.

It is an arithmetic number, because the mean of its divisors is an integer number (1588080).

Almost surely, 2^12917997 is an apocalyptic number.

It is an amenable number.

12917997 is a deficient number, since it is larger than the sum of its proper divisors (6138963).

12917997 is a wasteful number, since it uses less digits than its factorization.

12917997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30592 (or 30589 counting only the distinct ones).

The product of its digits is 71442, while the sum is 45.

The square root of 12917997 is about 3594.1615155694. The cubic root of 12917997 is about 234.6380242873.

The spelling of 12917997 in words is "twelve million, nine hundred seventeen thousand, nine hundred ninety-seven".