13766861 has 2 divisors, whose sum is σ = 13766862. Its totient is φ = 13766860.

The previous prime is 13766839. The next prime is 13766867. The reversal of 13766861 is 16866731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10118761 + 3648100 = 3181^2 + 1910^2 .

It is a cyclic number.

It is not a de Polignac number, because 13766861 - 2¹⁸ = 13504717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13766867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6883430 + 6883431.

It is an arithmetic number, because the mean of its divisors is an integer number (6883431).

Almost surely, 2^13766861 is an apocalyptic number.

It is an amenable number.

13766861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13766861 is an equidigital number, since it uses as much as digits as its factorization.

13766861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 13766861 is about 3710.3720837673. The cubic root of 13766861 is about 239.6688778597.

The spelling of 13766861 in words is "thirteen million, seven hundred sixty-six thousand, eight hundred sixty-one".