27317971 has 4 divisors (see below), whose sum is σ = 28260000. Its totient is φ = 26375944.

The previous prime is 27317957. The next prime is 27317981. The reversal of 27317971 is 17971372.

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 27317971 - 2²³ = 18929363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27317971.

It is not an unprimeable number, because it can be changed into a prime (27317981) 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, 470971 + ... + 471028.

It is an arithmetic number, because the mean of its divisors is an integer number (7065000).

Almost surely, 2^27317971 is an apocalyptic number.

27317971 is a deficient number, since it is larger than the sum of its proper divisors (942029).

27317971 is an equidigital number, since it uses as much as digits as its factorization.

27317971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942028.

The product of its digits is 18522, while the sum is 37.

The square root of 27317971 is about 5226.6596407266. The cubic root of 27317971 is about 301.1730773566.

The spelling of 27317971 in words is "twenty-seven million, three hundred seventeen thousand, nine hundred seventy-one".