13996861 has 2 divisors, whose sum is σ = 13996862. Its totient is φ = 13996860.

The previous prime is 13996837. The next prime is 13996907. The reversal of 13996861 is 16869931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8265625 + 5731236 = 2875^2 + 2394^2 .

It is a cyclic number.

It is not a de Polignac number, because 13996861 - 2⁷ = 13996733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13996061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6998430 + 6998431.

It is an arithmetic number, because the mean of its divisors is an integer number (6998431).

Almost surely, 2^13996861 is an apocalyptic number.

It is an amenable number.

13996861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13996861 is an equidigital number, since it uses as much as digits as its factorization.

13996861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 13996861 is about 3741.2378967395. The cubic root of 13996861 is about 240.9962121269.

The spelling of 13996861 in words is "thirteen million, nine hundred ninety-six thousand, eight hundred sixty-one".