13328287 has 4 divisors (see below), whose sum is σ = 15232336. Its totient is φ = 11424240.

The previous prime is 13328279. The next prime is 13328309. The reversal of 13328287 is 78282331.

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

It is a cyclic number.

It is not a de Polignac number, because 13328287 - 2³ = 13328279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13328207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 952014 + ... + 952027.

It is an arithmetic number, because the mean of its divisors is an integer number (3808084).

Almost surely, 2^13328287 is an apocalyptic number.

13328287 is a deficient number, since it is larger than the sum of its proper divisors (1904049).

13328287 is an equidigital number, since it uses as much as digits as its factorization.

13328287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904048.

The product of its digits is 16128, while the sum is 34.

The square root of 13328287 is about 3650.7926536576. The cubic root of 13328287 is about 237.0963010757.

The spelling of 13328287 in words is "thirteen million, three hundred twenty-eight thousand, two hundred eighty-seven".