13708661 has 2 divisors, whose sum is σ = 13708662. Its totient is φ = 13708660.

The previous prime is 13708657. The next prime is 13708679. The reversal of 13708661 is 16680731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12208036 + 1500625 = 3494^2 + 1225^2 .

It is an emirp because it is prime and its reverse (16680731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13708661 - 2² = 13708657 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 (13708691) 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, 6854330 + 6854331.

It is an arithmetic number, because the mean of its divisors is an integer number (6854331).

Almost surely, 2^13708661 is an apocalyptic number.

It is an amenable number.

13708661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13708661 is an equidigital number, since it uses as much as digits as its factorization.

13708661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 13708661 is about 3702.5208979829. The cubic root of 13708661 is about 239.3306639591.

The spelling of 13708661 in words is "thirteen million, seven hundred eight thousand, six hundred sixty-one".