13751681 has 2 divisors, whose sum is σ = 13751682. Its totient is φ = 13751680.

The previous prime is 13751663. The next prime is 13751737. The reversal of 13751681 is 18615731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10080625 + 3671056 = 3175^2 + 1916^2 .

It is a cyclic number.

It is not a de Polignac number, because 13751681 - 2¹⁰ = 13750657 is a prime.

It is a super-2 number, since 2×13751681² = 378217460651522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13751651) 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 as a sum of consecutive naturals, namely, 6875840 + 6875841.

It is an arithmetic number, because the mean of its divisors is an integer number (6875841).

Almost surely, 2^13751681 is an apocalyptic number.

It is an amenable number.

13751681 is a deficient number, since it is larger than the sum of its proper divisors (1).

13751681 is an equidigital number, since it uses as much as digits as its factorization.

13751681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 32.

The square root of 13751681 is about 3708.3259026143. The cubic root of 13751681 is about 239.5807553363.

The spelling of 13751681 in words is "thirteen million, seven hundred fifty-one thousand, six hundred eighty-one".