27081749 has 4 divisors (see below), whose sum is σ = 27279564. Its totient is φ = 26883936.

The previous prime is 27081739. The next prime is 27081751. The reversal of 27081749 is 94718072.

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 7941124 + 19140625 = 2818^2 + 4375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27081749 is a prime.

It is a super-2 number, since 2×27081749² = 1466842257798002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27081709) 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, 98702 + ... + 98975.

It is an arithmetic number, because the mean of its divisors is an integer number (6819891).

Almost surely, 2^27081749 is an apocalyptic number.

It is an amenable number.

27081749 is a deficient number, since it is larger than the sum of its proper divisors (197815).

27081749 is a wasteful number, since it uses less digits than its factorization.

27081749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197814.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 27081749 is about 5204.0127786161. The cubic root of 27081749 is about 300.3024690132.

The spelling of 27081749 in words is "twenty-seven million, eighty-one thousand, seven hundred forty-nine".