13328987 has 8 divisors (see below), whose sum is σ = 15298272. Its totient is φ = 11376000.

The previous prime is 13328981. The next prime is 13328993. The reversal of 13328987 is 78982331.

It is an interprime number because it is at equal distance from previous prime (13328981) and next prime (13328993).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13328987 - 2⁴ = 13328971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13328981) 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 7 ways as a sum of consecutive naturals, for example, 2264 + ... + 5637.

It is an arithmetic number, because the mean of its divisors is an integer number (1912284).

Almost surely, 2^13328987 is an apocalyptic number.

13328987 is a deficient number, since it is larger than the sum of its proper divisors (1969285).

13328987 is an equidigital number, since it uses as much as digits as its factorization.

13328987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8149.

The product of its digits is 72576, while the sum is 41.

The square root of 13328987 is about 3650.8885219902. Note that the first 3 decimals coincide. The cubic root of 13328987 is about 237.1004517593.

The spelling of 13328987 in words is "thirteen million, three hundred twenty-eight thousand, nine hundred eighty-seven".