27490109 has 2 divisors, whose sum is σ = 27490110. Its totient is φ = 27490108.

The previous prime is 27490063. The next prime is 27490123. The reversal of 27490109 is 90109472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19166884 + 8323225 = 4378^2 + 2885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27490109 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 (27490189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13745054 + 13745055.

It is an arithmetic number, because the mean of its divisors is an integer number (13745055).

Almost surely, 2^27490109 is an apocalyptic number.

It is an amenable number.

27490109 is a deficient number, since it is larger than the sum of its proper divisors (1).

27490109 is an equidigital number, since it uses as much as digits as its factorization.

27490109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 27490109 is about 5243.1010861894. The cubic root of 27490109 is about 301.8043445641.

The spelling of 27490109 in words is "twenty-seven million, four hundred ninety thousand, one hundred nine".