13997563 has 2 divisors, whose sum is σ = 13997564. Its totient is φ = 13997562.

The previous prime is 13997561. The next prime is 13997567. The reversal of 13997563 is 36579931.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13997563 - 2¹ = 13997561 is a prime.

Together with 13997561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13997561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6998781 + 6998782.

It is an arithmetic number, because the mean of its divisors is an integer number (6998782).

Almost surely, 2^13997563 is an apocalyptic number.

13997563 is a deficient number, since it is larger than the sum of its proper divisors (1).

13997563 is an equidigital number, since it uses as much as digits as its factorization.

13997563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153090, while the sum is 43.

The square root of 13997563 is about 3741.3317147775. The cubic root of 13997563 is about 241.0002410424. Note that the first 3 decimals are identical.

The spelling of 13997563 in words is "thirteen million, nine hundred ninety-seven thousand, five hundred sixty-three".