27057689 has 2 divisors, whose sum is σ = 27057690. Its totient is φ = 27057688.

The previous prime is 27057677. The next prime is 27057721. The reversal of 27057689 is 98675072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27040000 + 17689 = 5200^2 + 133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27057689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (27057649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13528844 + 13528845.

It is an arithmetic number, because the mean of its divisors is an integer number (13528845).

Almost surely, 2^27057689 is an apocalyptic number.

It is an amenable number.

27057689 is a deficient number, since it is larger than the sum of its proper divisors (1).

27057689 is an equidigital number, since it uses as much as digits as its factorization.

27057689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 27057689 is about 5201.7005873080. The cubic root of 27057689 is about 300.2135109705.

The spelling of 27057689 in words is "twenty-seven million, fifty-seven thousand, six hundred eighty-nine".