12887717 has 4 divisors (see below), whose sum is σ = 13645836. Its totient is φ = 12129600.

The previous prime is 12887713. The next prime is 12887731. The reversal of 12887717 is 71778821.

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 3682561 + 9205156 = 1919^2 + 3034^2 .

It is a cyclic number.

It is not a de Polignac number, because 12887717 - 2² = 12887713 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 (12887713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379034 + ... + 379067.

It is an arithmetic number, because the mean of its divisors is an integer number (3411459).

Almost surely, 2^12887717 is an apocalyptic number.

12887717 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12887717 is a deficient number, since it is larger than the sum of its proper divisors (758119).

12887717 is an equidigital number, since it uses as much as digits as its factorization.

12887717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758118.

The product of its digits is 43904, while the sum is 41.

The square root of 12887717 is about 3589.9466569853. The cubic root of 12887717 is about 234.4545490447.

The spelling of 12887717 in words is "twelve million, eight hundred eighty-seven thousand, seven hundred seventeen".