12986317 has 4 divisors (see below), whose sum is σ = 13750236. Its totient is φ = 12222400.

The previous prime is 12986279. The next prime is 12986333. The reversal of 12986317 is 71368921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12187081 + 799236 = 3491^2 + 894^2 .

It is a cyclic number.

It is not a de Polignac number, because 12986317 - 2¹¹ = 12984269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12986357) 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, 381934 + ... + 381967.

It is an arithmetic number, because the mean of its divisors is an integer number (3437559).

Almost surely, 2^12986317 is an apocalyptic number.

12986317 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12986317 is a deficient number, since it is larger than the sum of its proper divisors (763919).

12986317 is an equidigital number, since it uses as much as digits as its factorization.

12986317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763918.

The product of its digits is 18144, while the sum is 37.

The square root of 12986317 is about 3603.6532852093. The cubic root of 12986317 is about 235.0509441387.

The spelling of 12986317 in words is "twelve million, nine hundred eighty-six thousand, three hundred seventeen".