27028909 has 2 divisors, whose sum is σ = 27028910. Its totient is φ = 27028908.

The previous prime is 27028879. The next prime is 27028927. The reversal of 27028909 is 90982072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23068809 + 3960100 = 4803^2 + 1990^2 .

It is a cyclic number.

It is not a de Polignac number, because 27028909 - 2⁵ = 27028877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27028999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13514454 + 13514455.

It is an arithmetic number, because the mean of its divisors is an integer number (13514455).

Almost surely, 2^27028909 is an apocalyptic number.

It is an amenable number.

27028909 is a deficient number, since it is larger than the sum of its proper divisors (1).

27028909 is an equidigital number, since it uses as much as digits as its factorization.

27028909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 27028909 is about 5198.9334483142. The cubic root of 27028909 is about 300.1070321795.

It can be divided in two parts, 2702 and 8909, that added together give a palindrome (11611).

The spelling of 27028909 in words is "twenty-seven million, twenty-eight thousand, nine hundred nine".