27090109 has 2 divisors, whose sum is σ = 27090110. Its totient is φ = 27090108.

The previous prime is 27090101. The next prime is 27090131. The reversal of 27090109 is 90109072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17665209 + 9424900 = 4203^2 + 3070^2 .

It is a cyclic number.

It is not a de Polignac number, because 27090109 - 2³ = 27090101 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 (27090101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13545054 + 13545055.

It is an arithmetic number, because the mean of its divisors is an integer number (13545055).

Almost surely, 2^27090109 is an apocalyptic number.

It is an amenable number.

27090109 is a deficient number, since it is larger than the sum of its proper divisors (1).

27090109 is an equidigital number, since it uses as much as digits as its factorization.

27090109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 27090109 is about 5204.8159429513. The cubic root of 27090109 is about 300.3333664558. Note that the first 4 decimals are identical.

The spelling of 27090109 in words is "twenty-seven million, ninety thousand, one hundred nine".