27792971 has 4 divisors (see below), whose sum is σ = 27857592. Its totient is φ = 27728352.

The previous prime is 27792949. The next prime is 27792997. The reversal of 27792971 is 17929772.

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 27792971 - 2¹⁴ = 27776587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27792071) 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, 31661 + ... + 32526.

It is an arithmetic number, because the mean of its divisors is an integer number (6964398).

Almost surely, 2^27792971 is an apocalyptic number.

27792971 is a deficient number, since it is larger than the sum of its proper divisors (64621).

27792971 is an equidigital number, since it uses as much as digits as its factorization.

27792971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64620.

The product of its digits is 111132, while the sum is 44.

The square root of 27792971 is about 5271.9039255282. The cubic root of 27792971 is about 302.9086379088.

The spelling of 27792971 in words is "twenty-seven million, seven hundred ninety-two thousand, nine hundred seventy-one".