13661003 has 2 divisors, whose sum is σ = 13661004. Its totient is φ = 13661002.

The previous prime is 13660991. The next prime is 13661017. The reversal of 13661003 is 30016631.

13661003 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (30016631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13661003 - 2⁶ = 13660939 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13661033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6830501 + 6830502.

It is an arithmetic number, because the mean of its divisors is an integer number (6830502).

Almost surely, 2^13661003 is an apocalyptic number.

13661003 is a deficient number, since it is larger than the sum of its proper divisors (1).

13661003 is an equidigital number, since it uses as much as digits as its factorization.

13661003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 13661003 is about 3696.0794093201. The cubic root of 13661003 is about 239.0529985231.

Adding to 13661003 its reverse (30016631), we get a palindrome (43677634).

The spelling of 13661003 in words is "thirteen million, six hundred sixty-one thousand, three".