27631987 has 8 divisors (see below), whose sum is σ = 29435616. Its totient is φ = 25848192.

The previous prime is 27631969. The next prime is 27631997. The reversal of 27631987 is 78913672.

It is a happy number.

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 27631987 - 2¹⁵ = 27599219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27631907) 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, 2028 + ... + 7705.

It is an arithmetic number, because the mean of its divisors is an integer number (3679452).

Almost surely, 2^27631987 is an apocalyptic number.

27631987 is a deficient number, since it is larger than the sum of its proper divisors (1803629).

27631987 is a wasteful number, since it uses less digits than its factorization.

27631987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9917.

The product of its digits is 127008, while the sum is 43.

The square root of 27631987 is about 5256.6136437825. The cubic root of 27631987 is about 302.3226636299.

The spelling of 27631987 in words is "twenty-seven million, six hundred thirty-one thousand, nine hundred eighty-seven".