27797899 has 4 divisors (see below), whose sum is σ = 27825400. Its totient is φ = 27770400.

The previous prime is 27797881. The next prime is 27797923. The reversal of 27797899 is 99879772.

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

It is a cyclic number.

It is not a de Polignac number, because 27797899 - 2¹¹ = 27795851 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, 12174 + ... + 14275.

It is an arithmetic number, because the mean of its divisors is an integer number (6956350).

Almost surely, 2^27797899 is an apocalyptic number.

27797899 is a deficient number, since it is larger than the sum of its proper divisors (27501).

27797899 is a wasteful number, since it uses less digits than its factorization.

27797899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27500.

The product of its digits is 4000752, while the sum is 58.

The square root of 27797899 is about 5272.3712881397. The cubic root of 27797899 is about 302.9265398638.

The spelling of 27797899 in words is "twenty-seven million, seven hundred ninety-seven thousand, eight hundred ninety-nine".