27418109 has 2 divisors, whose sum is σ = 27418110. Its totient is φ = 27418108.

The previous prime is 27418091. The next prime is 27418129. The reversal of 27418109 is 90181472.

Together with previous prime (27418091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22534009 + 4884100 = 4747^2 + 2210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27418109 is a prime.

It is a super-2 number, since 2×27418109² = 1503505402271762, which contains 22 as substring.

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

It is equal to p_1707449 and since 27418109 and 1707449 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27418129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13709054 + 13709055.

It is an arithmetic number, because the mean of its divisors is an integer number (13709055).

Almost surely, 2^27418109 is an apocalyptic number.

It is an amenable number.

27418109 is a deficient number, since it is larger than the sum of its proper divisors (1).

27418109 is an equidigital number, since it uses as much as digits as its factorization.

27418109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 27418109 is about 5236.2304189178. The cubic root of 27418109 is about 301.5406265413.

The spelling of 27418109 in words is "twenty-seven million, four hundred eighteen thousand, one hundred nine".