27645713 has 4 divisors (see below), whose sum is σ = 27669300. Its totient is φ = 27622128.

The previous prime is 27645691. The next prime is 27645719. The reversal of 27645713 is 31754672.

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 12334144 + 15311569 = 3512^2 + 3913^2 .

It is a cyclic number.

It is not a de Polignac number, because 27645713 - 2¹² = 27641617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27645719) 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, 9938 + ... + 12411.

It is an arithmetic number, because the mean of its divisors is an integer number (6917325).

Almost surely, 2^27645713 is an apocalyptic number.

It is an amenable number.

27645713 is a deficient number, since it is larger than the sum of its proper divisors (23587).

27645713 is a wasteful number, since it uses less digits than its factorization.

27645713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23586.

The product of its digits is 35280, while the sum is 35.

The square root of 27645713 is about 5257.9190750714. The cubic root of 27645713 is about 302.3727142465.

The spelling of 27645713 in words is "twenty-seven million, six hundred forty-five thousand, seven hundred thirteen".