13873661 has 2 divisors, whose sum is σ = 13873662. Its totient is φ = 13873660.

The previous prime is 13873633. The next prime is 13873679. The reversal of 13873661 is 16637831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13764100 + 109561 = 3710^2 + 331^2 .

It is a cyclic number.

It is not a de Polignac number, because 13873661 - 2⁶ = 13873597 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13873681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6936830 + 6936831.

It is an arithmetic number, because the mean of its divisors is an integer number (6936831).

Almost surely, 2^13873661 is an apocalyptic number.

It is an amenable number.

13873661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13873661 is an equidigital number, since it uses as much as digits as its factorization.

13873661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 13873661 is about 3724.7363665097. The cubic root of 13873661 is about 240.2870465938.

The spelling of 13873661 in words is "thirteen million, eight hundred seventy-three thousand, six hundred sixty-one".