13028537 has 4 divisors (see below), whose sum is σ = 13059060. Its totient is φ = 12998016.

The previous prime is 13028531. The next prime is 13028539. The reversal of 13028537 is 73582031.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3671056 + 9357481 = 1916^2 + 3059^2 .

It is a cyclic number.

It is not a de Polignac number, because 13028537 - 2⁶ = 13028473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13028531) 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, 14612 + ... + 15477.

It is an arithmetic number, because the mean of its divisors is an integer number (3264765).

Almost surely, 2^13028537 is an apocalyptic number.

It is an amenable number.

13028537 is a deficient number, since it is larger than the sum of its proper divisors (30523).

13028537 is an equidigital number, since it uses as much as digits as its factorization.

13028537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30522.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 13028537 is about 3609.5064759604. The cubic root of 13028537 is about 235.3053944117.

The spelling of 13028537 in words is "thirteen million, twenty-eight thousand, five hundred thirty-seven".