27899117 has 4 divisors (see below), whose sum is σ = 27967740. Its totient is φ = 27830496.

The previous prime is 27899093. The next prime is 27899171. The reversal of 27899117 is 71199872.

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 18541636 + 9357481 = 4306^2 + 3059^2 .

It is a cyclic number.

It is not a de Polignac number, because 27899117 - 2¹⁰ = 27898093 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 (27899177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33698 + ... + 34515.

It is an arithmetic number, because the mean of its divisors is an integer number (6991935).

Almost surely, 2^27899117 is an apocalyptic number.

It is an amenable number.

27899117 is a deficient number, since it is larger than the sum of its proper divisors (68623).

27899117 is an equidigital number, since it uses as much as digits as its factorization.

27899117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68622.

The product of its digits is 63504, while the sum is 44.

The square root of 27899117 is about 5281.9614727864. The cubic root of 27899117 is about 303.2937675990.

The spelling of 27899117 in words is "twenty-seven million, eight hundred ninety-nine thousand, one hundred seventeen".