27009965 has 4 divisors (see below), whose sum is σ = 32411964. Its totient is φ = 21607968.

The previous prime is 27009949. The next prime is 27009967. The reversal of 27009965 is 56990072.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9554281 + 17455684 = 3091^2 + 4178^2 .

It is a cyclic number.

It is not a de Polignac number, because 27009965 - 2⁴ = 27009949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27009967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2700992 + ... + 2701001.

It is an arithmetic number, because the mean of its divisors is an integer number (8102991).

Almost surely, 2^27009965 is an apocalyptic number.

It is an amenable number.

27009965 is a deficient number, since it is larger than the sum of its proper divisors (5401999).

27009965 is an equidigital number, since it uses as much as digits as its factorization.

27009965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5401998.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 27009965 is about 5197.1112168204. Note that the first 3 decimals coincide. The cubic root of 27009965 is about 300.0369028678.

The spelling of 27009965 in words is "twenty-seven million, nine thousand, nine hundred sixty-five".