27870109 has 2 divisors, whose sum is σ = 27870110. Its totient is φ = 27870108.

The previous prime is 27870097. The next prime is 27870113. The reversal of 27870109 is 90107872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22534009 + 5336100 = 4747^2 + 2310^2 .

It is a cyclic number.

It is not a de Polignac number, because 27870109 - 2⁵ = 27870077 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27870179) 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, 13935054 + 13935055.

It is an arithmetic number, because the mean of its divisors is an integer number (13935055).

Almost surely, 2^27870109 is an apocalyptic number.

It is an amenable number.

27870109 is a deficient number, since it is larger than the sum of its proper divisors (1).

27870109 is an equidigital number, since it uses as much as digits as its factorization.

27870109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 27870109 is about 5279.2148090412. The cubic root of 27870109 is about 303.1886149690.

The spelling of 27870109 in words is "twenty-seven million, eight hundred seventy thousand, one hundred nine".