27409909 has 2 divisors, whose sum is σ = 27409910. Its totient is φ = 27409908.

The previous prime is 27409873. The next prime is 27409927. The reversal of 27409909 is 90990472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27269284 + 140625 = 5222^2 + 375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27409909 is a prime.

It is a super-2 number, since 2×27409909² = 1502606222776562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27409999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13704954 + 13704955.

It is an arithmetic number, because the mean of its divisors is an integer number (13704955).

Almost surely, 2^27409909 is an apocalyptic number.

It is an amenable number.

27409909 is a deficient number, since it is larger than the sum of its proper divisors (1).

27409909 is an equidigital number, since it uses as much as digits as its factorization.

27409909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 27409909 is about 5235.4473543337. The cubic root of 27409909 is about 301.5105627165.

The spelling of 27409909 in words is "twenty-seven million, four hundred nine thousand, nine hundred nine".