13771717 has 6 divisors (see below), whose sum is σ = 14629778. Its totient is φ = 12961344.

The previous prime is 13771711. The next prime is 13771727. The reversal of 13771717 is 71717731.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4322241 + 9449476 = 2079^2 + 3074^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13771717 is a prime.

It is a Duffinian number.

13771717 is a modest number, since divided by 1717 gives 1377 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13771711) 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 5 ways as a sum of consecutive naturals, for example, 23538 + ... + 24115.

Almost surely, 2^13771717 is an apocalyptic number.

13771717 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

13771717 is a deficient number, since it is larger than the sum of its proper divisors (858061).

13771717 is an equidigital number, since it uses as much as digits as its factorization.

13771717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47687 (or 47670 counting only the distinct ones).

The product of its digits is 7203, while the sum is 34.

The square root of 13771717 is about 3711.0264078823. The cubic root of 13771717 is about 239.6970541026.

The spelling of 13771717 in words is "thirteen million, seven hundred seventy-one thousand, seven hundred seventeen".