27797873 has 4 divisors (see below), whose sum is σ = 29433060. Its totient is φ = 26162688.

The previous prime is 27797827. The next prime is 27797879. The reversal of 27797873 is 37879772.

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 23541904 + 4255969 = 4852^2 + 2063^2 .

It is a cyclic number.

It is not a de Polignac number, because 27797873 - 2⁸ = 27797617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27797879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817568 + ... + 817601.

It is an arithmetic number, because the mean of its divisors is an integer number (7358265).

Almost surely, 2^27797873 is an apocalyptic number.

It is an amenable number.

27797873 is a deficient number, since it is larger than the sum of its proper divisors (1635187).

27797873 is a wasteful number, since it uses less digits than its factorization.

27797873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635186.

The product of its digits is 1037232, while the sum is 50.

The square root of 27797873 is about 5272.3688224554. The cubic root of 27797873 is about 302.9264454191.

The spelling of 27797873 in words is "twenty-seven million, seven hundred ninety-seven thousand, eight hundred seventy-three".