27713639 has 2 divisors, whose sum is σ = 27713640. Its totient is φ = 27713638.

The previous prime is 27713633. The next prime is 27713641. The reversal of 27713639 is 93631772.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27713639 is a prime.

Together with 27713641, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27713633) 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 as a sum of consecutive naturals, namely, 13856819 + 13856820.

It is an arithmetic number, because the mean of its divisors is an integer number (13856820).

Almost surely, 2^27713639 is an apocalyptic number.

27713639 is a deficient number, since it is larger than the sum of its proper divisors (1).

27713639 is an equidigital number, since it uses as much as digits as its factorization.

27713639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 38.

The square root of 27713639 is about 5264.3745117535. The cubic root of 27713639 is about 302.6201567147.

The spelling of 27713639 in words is "twenty-seven million, seven hundred thirteen thousand, six hundred thirty-nine".