27320971 has 4 divisors (see below), whose sum is σ = 27334944. Its totient is φ = 27307000.

The previous prime is 27320963. The next prime is 27320981. The reversal of 27320971 is 17902372.

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 27320971 - 2³ = 27320963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27320981) 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, 3460 + ... + 8161.

It is an arithmetic number, because the mean of its divisors is an integer number (6833736).

Almost surely, 2^27320971 is an apocalyptic number.

27320971 is a deficient number, since it is larger than the sum of its proper divisors (13973).

27320971 is a wasteful number, since it uses less digits than its factorization.

27320971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13972.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 27320971 is about 5226.9466230295. The cubic root of 27320971 is about 301.1841016766.

The spelling of 27320971 in words is "twenty-seven million, three hundred twenty thousand, nine hundred seventy-one".