27409009 has 2 divisors, whose sum is σ = 27409010. Its totient is φ = 27409008.

The previous prime is 27408967. The next prime is 27409027. The reversal of 27409009 is 90090472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21298225 + 6110784 = 4615^2 + 2472^2 .

It is a cyclic number.

It is not a de Polignac number, because 27409009 - 2²³ = 19020401 is a prime.

It is not a weakly prime, because it can be changed into another prime (27409079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13704504 + 13704505.

It is an arithmetic number, because the mean of its divisors is an integer number (13704505).

Almost surely, 2^27409009 is an apocalyptic number.

It is an amenable number.

27409009 is a deficient number, since it is larger than the sum of its proper divisors (1).

27409009 is an equidigital number, since it uses as much as digits as its factorization.

27409009 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 31.

The square root of 27409009 is about 5235.3614010878. The cubic root of 27409009 is about 301.5072626632.

The spelling of 27409009 in words is "twenty-seven million, four hundred nine thousand, nine".