13423563 has 24 divisors (see below), whose sum is σ = 20665008. Its totient is φ = 8701344.

The previous prime is 13423547. The next prime is 13423573. The reversal of 13423563 is 36532431.

It is a happy number.

It is not a de Polignac number, because 13423563 - 2⁴ = 13423547 is a prime.

It is a super-2 number, since 2×13423563² = 360384087229938, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13423573) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8245 + ... + 9737.

It is an arithmetic number, because the mean of its divisors is an integer number (861042).

Almost surely, 2^13423563 is an apocalyptic number.

13423563 is a deficient number, since it is larger than the sum of its proper divisors (7241445).

13423563 is an equidigital number, since it uses as much as digits as its factorization.

13423563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545 (or 1533 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 13423563 is about 3663.8180904625. The cubic root of 13423563 is about 237.6599137245.

Adding to 13423563 its reverse (36532431), we get a palindrome (49955994).

The spelling of 13423563 in words is "thirteen million, four hundred twenty-three thousand, five hundred sixty-three".