13663873 has 2 divisors, whose sum is σ = 13663874. Its totient is φ = 13663872.

The previous prime is 13663861. The next prime is 13663883. The reversal of 13663873 is 37836631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11751184 + 1912689 = 3428^2 + 1383^2 .

It is a cyclic number.

It is not a de Polignac number, because 13663873 - 2⁹ = 13663361 is a prime.

It is equal to p₈₈₉₆₂₄ and since 13663873 and 889624 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (13663813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6831936 + 6831937.

It is an arithmetic number, because the mean of its divisors is an integer number (6831937).

Almost surely, 2^13663873 is an apocalyptic number.

It is an amenable number.

13663873 is a deficient number, since it is larger than the sum of its proper divisors (1).

13663873 is an equidigital number, since it uses as much as digits as its factorization.

13663873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 13663873 is about 3696.4676381648. The cubic root of 13663873 is about 239.0697379984.

It can be divided in two parts, 136 and 63873, that added together give a square (64009 = 253²).

The spelling of 13663873 in words is "thirteen million, six hundred sixty-three thousand, eight hundred seventy-three".