13847861 has 2 divisors, whose sum is σ = 13847862. Its totient is φ = 13847860.

The previous prime is 13847857. The next prime is 13847887. The reversal of 13847861 is 16874831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13830961 + 16900 = 3719^2 + 130^2 .

It is a cyclic number.

It is not a de Polignac number, because 13847861 - 2² = 13847857 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 (13847891) 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, 6923930 + 6923931.

It is an arithmetic number, because the mean of its divisors is an integer number (6923931).

Almost surely, 2^13847861 is an apocalyptic number.

It is an amenable number.

13847861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13847861 is an equidigital number, since it uses as much as digits as its factorization.

13847861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The square root of 13847861 is about 3721.2714225114. The cubic root of 13847861 is about 240.1380051196.

The spelling of 13847861 in words is "thirteen million, eight hundred forty-seven thousand, eight hundred sixty-one".