13735781 has 2 divisors, whose sum is σ = 13735782. Its totient is φ = 13735780.

The previous prime is 13735751. The next prime is 13735789. The reversal of 13735781 is 18753731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7022500 + 6713281 = 2650^2 + 2591^2 .

It is a cyclic number.

It is not a de Polignac number, because 13735781 - 2¹⁴ = 13719397 is a prime.

It is a super-2 number, since 2×13735781² = 377343359359922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13735789) 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, 6867890 + 6867891.

It is an arithmetic number, because the mean of its divisors is an integer number (6867891).

Almost surely, 2^13735781 is an apocalyptic number.

It is an amenable number.

13735781 is a deficient number, since it is larger than the sum of its proper divisors (1).

13735781 is an equidigital number, since it uses as much as digits as its factorization.

13735781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 35.

The square root of 13735781 is about 3706.1814580509. The cubic root of 13735781 is about 239.4883835237.

The spelling of 13735781 in words is "thirteen million, seven hundred thirty-five thousand, seven hundred eighty-one".