27791117 has 2 divisors, whose sum is σ = 27791118. Its totient is φ = 27791116.

The previous prime is 27791089. The next prime is 27791123. The reversal of 27791117 is 71119772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20921476 + 6869641 = 4574^2 + 2621^2 .

It is a cyclic number.

It is not a de Polignac number, because 27791117 - 2¹⁰ = 27790093 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 (27791177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13895558 + 13895559.

It is an arithmetic number, because the mean of its divisors is an integer number (13895559).

Almost surely, 2^27791117 is an apocalyptic number.

It is an amenable number.

27791117 is a deficient number, since it is larger than the sum of its proper divisors (1).

27791117 is an equidigital number, since it uses as much as digits as its factorization.

27791117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6174, while the sum is 35.

The square root of 27791117 is about 5271.7280847934. The cubic root of 27791117 is about 302.9019023316.

The spelling of 27791117 in words is "twenty-seven million, seven hundred ninety-one thousand, one hundred seventeen".