12691347 has 8 divisors (see below), whose sum is σ = 16960656. Its totient is φ = 8441472.

The previous prime is 12691337. The next prime is 12691361. The reversal of 12691347 is 74319621.

12691347 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12691347 - 2⁷ = 12691219 is a prime.

It is a super-2 number, since 2×12691347² = 322140577348818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12691337) 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, 3258 + ... + 5999.

It is an arithmetic number, because the mean of its divisors is an integer number (2120082).

Almost surely, 2^12691347 is an apocalyptic number.

12691347 is a deficient number, since it is larger than the sum of its proper divisors (4269309).

12691347 is an equidigital number, since it uses as much as digits as its factorization.

12691347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9717.

The product of its digits is 9072, while the sum is 33.

The square root of 12691347 is about 3562.4916842008. The cubic root of 12691347 is about 233.2576555031.

The spelling of 12691347 in words is "twelve million, six hundred ninety-one thousand, three hundred forty-seven".