13340861 has 2 divisors, whose sum is σ = 13340862. Its totient is φ = 13340860.

The previous prime is 13340849. The next prime is 13340863. The reversal of 13340861 is 16804331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9060100 + 4280761 = 3010^2 + 2069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13340861 is a prime.

It is a Sophie Germain prime.

Together with 13340863, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13340861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13340863) 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, 6670430 + 6670431.

It is an arithmetic number, because the mean of its divisors is an integer number (6670431).

Almost surely, 2^13340861 is an apocalyptic number.

It is an amenable number.

13340861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13340861 is an equidigital number, since it uses as much as digits as its factorization.

13340861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 13340861 is about 3652.5143394653. The cubic root of 13340861 is about 237.1708370825.

The spelling of 13340861 in words is "thirteen million, three hundred forty thousand, eight hundred sixty-one".