13867661 has 2 divisors, whose sum is σ = 13867662. Its totient is φ = 13867660.

The previous prime is 13867639. The next prime is 13867669. The reversal of 13867661 is 16676831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13734436 + 133225 = 3706^2 + 365^2 .

It is an emirp because it is prime and its reverse (16676831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13867661 is a prime.

It is a super-2 number, since 2×13867661² = 384624043221842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13867669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6933830 + 6933831.

It is an arithmetic number, because the mean of its divisors is an integer number (6933831).

Almost surely, 2^13867661 is an apocalyptic number.

It is an amenable number.

13867661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13867661 is an equidigital number, since it uses as much as digits as its factorization.

13867661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 13867661 is about 3723.9308532786. The cubic root of 13867661 is about 240.2524022855.

The spelling of 13867661 in words is "thirteen million, eight hundred sixty-seven thousand, six hundred sixty-one".