27630691 has 4 divisors (see below), whose sum is σ = 30142584. Its totient is φ = 25118800.

The previous prime is 27630683. The next prime is 27630697. The reversal of 27630691 is 19603672.

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 27630691 - 2³ = 27630683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27630697) 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, 1255930 + ... + 1255951.

It is an arithmetic number, because the mean of its divisors is an integer number (7535646).

Almost surely, 2^27630691 is an apocalyptic number.

27630691 is a deficient number, since it is larger than the sum of its proper divisors (2511893).

27630691 is a wasteful number, since it uses less digits than its factorization.

27630691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511892.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 27630691 is about 5256.4903690580. The cubic root of 27630691 is about 302.3179370269.

The spelling of 27630691 in words is "twenty-seven million, six hundred thirty thousand, six hundred ninety-one".