13487533 has 4 divisors (see below), whose sum is σ = 13494940. Its totient is φ = 13480128.

The previous prime is 13487531. The next prime is 13487557. The reversal of 13487533 is 33578431.

13487533 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 8743849 + 4743684 = 2957^2 + 2178^2 .

It is a cyclic number.

It is not a de Polignac number, because 13487533 - 2¹ = 13487531 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 (13487531) 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, 1141 + ... + 5317.

It is an arithmetic number, because the mean of its divisors is an integer number (3373735).

Almost surely, 2^13487533 is an apocalyptic number.

It is an amenable number.

13487533 is a deficient number, since it is larger than the sum of its proper divisors (7407).

13487533 is an equidigital number, since it uses as much as digits as its factorization.

13487533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7406.

The product of its digits is 30240, while the sum is 34.

The square root of 13487533 is about 3672.5376784997. The cubic root of 13487533 is about 238.0368384472.

The spelling of 13487533 in words is "thirteen million, four hundred eighty-seven thousand, five hundred thirty-three".