13087537 has 4 divisors (see below), whose sum is σ = 13104756. Its totient is φ = 13070320.

The previous prime is 13087519. The next prime is 13087541. The reversal of 13087537 is 73578031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73578031 = 43 ⋅1711117.

It can be written as a sum of positive squares in 2 ways, for example, as 2322576 + 10764961 = 1524^2 + 3281^2 .

It is a cyclic number.

It is not a de Polignac number, because 13087537 - 2¹⁹ = 12563249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13087507) 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, 7414 + ... + 9007.

It is an arithmetic number, because the mean of its divisors is an integer number (3276189).

Almost surely, 2^13087537 is an apocalyptic number.

It is an amenable number.

13087537 is a deficient number, since it is larger than the sum of its proper divisors (17219).

13087537 is an equidigital number, since it uses as much as digits as its factorization.

13087537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17218.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 13087537 is about 3617.6701065741. The cubic root of 13087537 is about 235.6600547066.

The spelling of 13087537 in words is "thirteen million, eighty-seven thousand, five hundred thirty-seven".