27798887 has 2 divisors, whose sum is σ = 27798888. Its totient is φ = 27798886.

The previous prime is 27798829. The next prime is 27798899. The reversal of 27798887 is 78889772.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27798887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27798817) 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, 13899443 + 13899444.

It is an arithmetic number, because the mean of its divisors is an integer number (13899444).

Almost surely, 2^27798887 is an apocalyptic number.

27798887 is a deficient number, since it is larger than the sum of its proper divisors (1).

27798887 is an equidigital number, since it uses as much as digits as its factorization.

27798887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3161088, while the sum is 56.

The square root of 27798887 is about 5272.4649832882. The cubic root of 27798887 is about 302.9301287187.

The spelling of 27798887 in words is "twenty-seven million, seven hundred ninety-eight thousand, eight hundred eighty-seven".