12697718 has 8 divisors (see below), whose sum is σ = 20778120. Its totient is φ = 5771680.

The previous prime is 12697717. The next prime is 12697721. The reversal of 12697718 is 81779621.

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

It is a super-2 number, since 2×12697718² = 322464084815048, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12697717) 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, 288563 + ... + 288606.

It is an arithmetic number, because the mean of its divisors is an integer number (2597265).

Almost surely, 2^12697718 is an apocalyptic number.

12697718 is a deficient number, since it is larger than the sum of its proper divisors (8080402).

12697718 is a wasteful number, since it uses less digits than its factorization.

12697718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577182.

The product of its digits is 42336, while the sum is 41.

The square root of 12697718 is about 3563.3857495365. The cubic root of 12697718 is about 233.2966804105.

The spelling of 12697718 in words is "twelve million, six hundred ninety-seven thousand, seven hundred eighteen".