13563427 has 4 divisors (see below), whose sum is σ = 13690296. Its totient is φ = 13436560.

The previous prime is 13563419. The next prime is 13563439. The reversal of 13563427 is 72436531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13563427 - 2³ = 13563419 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13563457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63274 + ... + 63487.

It is an arithmetic number, because the mean of its divisors is an integer number (3422574).

Almost surely, 2^13563427 is an apocalyptic number.

13563427 is a deficient number, since it is larger than the sum of its proper divisors (126869).

13563427 is a wasteful number, since it uses less digits than its factorization.

13563427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126868.

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

The square root of 13563427 is about 3682.8558212344. The cubic root of 13563427 is about 238.4824793344.

Adding to 13563427 its reverse (72436531), we get a palindrome (85999958).

The spelling of 13563427 in words is "thirteen million, five hundred sixty-three thousand, four hundred twenty-seven".