13563247 has 2 divisors, whose sum is σ = 13563248. Its totient is φ = 13563246.

The previous prime is 13563241. The next prime is 13563257. The reversal of 13563247 is 74236531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13563247 - 2¹¹ = 13561199 is a prime.

It is equal to p₈₈₃₄₆₂ and since 13563247 and 883462 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13563241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6781623 + 6781624.

It is an arithmetic number, because the mean of its divisors is an integer number (6781624).

Almost surely, 2^13563247 is an apocalyptic number.

13563247 is a deficient number, since it is larger than the sum of its proper divisors (1).

13563247 is an equidigital number, since it uses as much as digits as its factorization.

13563247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 31.

The square root of 13563247 is about 3682.8313835961. The cubic root of 13563247 is about 238.4814243642.

Adding to 13563247 its reverse (74236531), we get a palindrome (87799778).

The spelling of 13563247 in words is "thirteen million, five hundred sixty-three thousand, two hundred forty-seven".