27780117 has 4 divisors (see below), whose sum is σ = 37040160. Its totient is φ = 18520076.

The previous prime is 27780097. The next prime is 27780127. The reversal of 27780117 is 71108772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27780117 - 2⁸ = 27779861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27780127) 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, 4630017 + ... + 4630022.

It is an arithmetic number, because the mean of its divisors is an integer number (9260040).

Almost surely, 2^27780117 is an apocalyptic number.

It is an amenable number.

27780117 is a deficient number, since it is larger than the sum of its proper divisors (9260043).

27780117 is an equidigital number, since it uses as much as digits as its factorization.

27780117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9260042.

The product of its (nonzero) digits is 5488, while the sum is 33.

The square root of 27780117 is about 5270.6846803807. The cubic root of 27780117 is about 302.8619331978.

Adding to 27780117 its reverse (71108772), we get a palindrome (98888889).

The spelling of 27780117 in words is "twenty-seven million, seven hundred eighty thousand, one hundred seventeen".