27933965 has 4 divisors (see below), whose sum is σ = 33520764. Its totient is φ = 22347168.

The previous prime is 27933959. The next prime is 27933967. The reversal of 27933965 is 56933972.

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 13410244 + 14523721 = 3662^2 + 3811^2 .

It is a cyclic number.

It is not a de Polignac number, because 27933965 - 2¹⁰ = 27932941 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 (27933967) 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, 2793392 + ... + 2793401.

It is an arithmetic number, because the mean of its divisors is an integer number (8380191).

Almost surely, 2^27933965 is an apocalyptic number.

It is an amenable number.

27933965 is a deficient number, since it is larger than the sum of its proper divisors (5586799).

27933965 is an equidigital number, since it uses as much as digits as its factorization.

27933965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5586798.

The product of its digits is 306180, while the sum is 44.

The square root of 27933965 is about 5285.2592178625. The cubic root of 27933965 is about 303.4199936215.

The spelling of 27933965 in words is "twenty-seven million, nine hundred thirty-three thousand, nine hundred sixty-five".