13523047 has 4 divisors (see below), whose sum is σ = 13531320. Its totient is φ = 13514776.

The previous prime is 13523039. The next prime is 13523063. The reversal of 13523047 is 74032531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74032531 = 19 ⋅3896449.

It is a cyclic number.

It is not a de Polignac number, because 13523047 - 2³ = 13523039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13523017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772 + ... + 5257.

It is an arithmetic number, because the mean of its divisors is an integer number (3382830).

Almost surely, 2^13523047 is an apocalyptic number.

13523047 is a deficient number, since it is larger than the sum of its proper divisors (8273).

13523047 is an equidigital number, since it uses as much as digits as its factorization.

13523047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8272.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 13523047 is about 3677.3695762053. The cubic root of 13523047 is about 238.2455801387.

Adding to 13523047 its reverse (74032531), we get a palindrome (87555578).

The spelling of 13523047 in words is "thirteen million, five hundred twenty-three thousand, forty-seven".