27639049 has 4 divisors (see below), whose sum is σ = 27664660. Its totient is φ = 27613440.

The previous prime is 27639047. The next prime is 27639061. The reversal of 27639049 is 94093672.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1065024 + 26574025 = 1032^2 + 5155^2 .

It is a cyclic number.

It is not a de Polignac number, because 27639049 - 2¹ = 27639047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27639047) 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, 11112 + ... + 13369.

It is an arithmetic number, because the mean of its divisors is an integer number (6916165).

Almost surely, 2^27639049 is an apocalyptic number.

It is an amenable number.

27639049 is a deficient number, since it is larger than the sum of its proper divisors (25611).

27639049 is a wasteful number, since it uses less digits than its factorization.

27639049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25610.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 27639049 is about 5257.2853260975. The cubic root of 27639049 is about 302.3484166433.

The spelling of 27639049 in words is "twenty-seven million, six hundred thirty-nine thousand, forty-nine".