12917998 has 8 divisors (see below), whose sum is σ = 19414440. Its totient is φ = 6446520.

The previous prime is 12917987. The next prime is 12917999. The reversal of 12917998 is 89971921.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 4888 + ... + 7051.

It is an arithmetic number, because the mean of its divisors is an integer number (2426805).

Almost surely, 2^12917998 is an apocalyptic number.

12917998 is a deficient number, since it is larger than the sum of its proper divisors (6496442).

12917998 is a wasteful number, since it uses less digits than its factorization.

12917998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12482.

The product of its digits is 81648, while the sum is 46.

The square root of 12917998 is about 3594.1616546839. The cubic root of 12917998 is about 234.6380303419.

The spelling of 12917998 in words is "twelve million, nine hundred seventeen thousand, nine hundred ninety-eight".