27091965 has 16 divisors (see below), whose sum is σ = 45897408. Its totient is φ = 13598976.

The previous prime is 27091963. The next prime is 27091969. The reversal of 27091965 is 56919072.

It is not a de Polignac number, because 27091965 - 2¹ = 27091963 is a prime.

It is a super-2 number, since 2×27091965² = 1467949135122450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27091963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52867 + ... + 53376.

It is an arithmetic number, because the mean of its divisors is an integer number (2868588).

Almost surely, 2^27091965 is an apocalyptic number.

It is an amenable number.

27091965 is a deficient number, since it is larger than the sum of its proper divisors (18805443).

27091965 is a wasteful number, since it uses less digits than its factorization.

27091965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106268.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 27091965 is about 5204.9942363080. The cubic root of 27091965 is about 300.3402251215.

It can be divided in two parts, 270 and 91965, that added together give a triangular number (92235 = T₄₂₉).

The spelling of 27091965 in words is "twenty-seven million, ninety-one thousand, nine hundred sixty-five".