27287987 has 4 divisors (see below), whose sum is σ = 27337536. Its totient is φ = 27238440.

The previous prime is 27287983. The next prime is 27287989. The reversal of 27287987 is 78978272.

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 27287987 - 2² = 27287983 is a prime.

It is a super-3 number, since 3×27287987³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27287983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23939 + ... + 25052.

It is an arithmetic number, because the mean of its divisors is an integer number (6834384).

Almost surely, 2^27287987 is an apocalyptic number.

27287987 is a deficient number, since it is larger than the sum of its proper divisors (49549).

27287987 is an equidigital number, since it uses as much as digits as its factorization.

27287987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49548.

The product of its digits is 790272, while the sum is 50.

The square root of 27287987 is about 5223.7904820159. The cubic root of 27287987 is about 301.0628485813.

The spelling of 27287987 in words is "twenty-seven million, two hundred eighty-seven thousand, nine hundred eighty-seven".