27639047 has 2 divisors, whose sum is σ = 27639048. Its totient is φ = 27639046.

The previous prime is 27639013. The next prime is 27639061. The reversal of 27639047 is 74093672.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27639047 - 2¹⁸ = 27376903 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27639047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27639097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13819523 + 13819524.

It is an arithmetic number, because the mean of its divisors is an integer number (13819524).

Almost surely, 2^27639047 is an apocalyptic number.

27639047 is a deficient number, since it is larger than the sum of its proper divisors (1).

27639047 is an equidigital number, since it uses as much as digits as its factorization.

27639047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 27639047 is about 5257.2851358853. The cubic root of 27639047 is about 302.3484093505.

The spelling of 27639047 in words is "twenty-seven million, six hundred thirty-nine thousand, forty-seven".