13781741 has 2 divisors, whose sum is σ = 13781742. Its totient is φ = 13781740.

The previous prime is 13781737. The next prime is 13781759. The reversal of 13781741 is 14718731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13213225 + 568516 = 3635^2 + 754^2 .

It is a cyclic number.

It is not a de Polignac number, because 13781741 - 2² = 13781737 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13781698 and 13781707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13781731) 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 as a sum of consecutive naturals, namely, 6890870 + 6890871.

It is an arithmetic number, because the mean of its divisors is an integer number (6890871).

Almost surely, 2^13781741 is an apocalyptic number.

It is an amenable number.

13781741 is a deficient number, since it is larger than the sum of its proper divisors (1).

13781741 is an equidigital number, since it uses as much as digits as its factorization.

13781741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 32.

The square root of 13781741 is about 3712.3767319603. The cubic root of 13781741 is about 239.7551959826.

The spelling of 13781741 in words is "thirteen million, seven hundred eighty-one thousand, seven hundred forty-one".