27688007 has 2 divisors, whose sum is σ = 27688008. Its totient is φ = 27688006.

The previous prime is 27687983. The next prime is 27688009. The reversal of 27688007 is 70088672.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27688007 is a prime.

Together with 27688009, 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 (27688009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13844003 + 13844004.

It is an arithmetic number, because the mean of its divisors is an integer number (13844004).

Almost surely, 2^27688007 is an apocalyptic number.

27688007 is a deficient number, since it is larger than the sum of its proper divisors (1).

27688007 is an equidigital number, since it uses as much as digits as its factorization.

27688007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 27688007 is about 5261.9394713356. The cubic root of 27688007 is about 302.5268313973.

The spelling of 27688007 in words is "twenty-seven million, six hundred eighty-eight thousand, seven".