12897718 has 16 divisors (see below), whose sum is σ = 19954080. Its totient is φ = 6249600.

The previous prime is 12897697. The next prime is 12897761. The reversal of 12897718 is 81779821.

It is a happy number.

It is a super-2 number, since 2×12897718² = 332702259215048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7918 + ... + 9406.

It is an arithmetic number, because the mean of its divisors is an integer number (1247130).

Almost surely, 2^12897718 is an apocalyptic number.

12897718 is a deficient number, since it is larger than the sum of its proper divisors (7056362).

12897718 is a wasteful number, since it uses less digits than its factorization.

12897718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623.

The product of its digits is 56448, while the sum is 43.

The square root of 12897718 is about 3591.3393044935. The cubic root of 12897718 is about 234.5151797388.

The spelling of 12897718 in words is "twelve million, eight hundred ninety-seven thousand, seven hundred eighteen".