13711681 has 2 divisors, whose sum is σ = 13711682. Its totient is φ = 13711680.

The previous prime is 13711667. The next prime is 13711717. The reversal of 13711681 is 18611731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12250000 + 1461681 = 3500^2 + 1209^2 .

It is an emirp because it is prime and its reverse (18611731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13711681 - 2⁷ = 13711553 is a prime.

It is a super-2 number, since 2×13711681² = 376020391691522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13711661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6855840 + 6855841.

It is an arithmetic number, because the mean of its divisors is an integer number (6855841).

Almost surely, 2^13711681 is an apocalyptic number.

It is an amenable number.

13711681 is a deficient number, since it is larger than the sum of its proper divisors (1).

13711681 is an equidigital number, since it uses as much as digits as its factorization.

13711681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 28.

The square root of 13711681 is about 3702.9287057679. The cubic root of 13711681 is about 239.3482374123.

The spelling of 13711681 in words is "thirteen million, seven hundred eleven thousand, six hundred eighty-one".