27973967 has 4 divisors (see below), whose sum is σ = 31970256. Its totient is φ = 23977680.

The previous prime is 27973963. The next prime is 27973969. The reversal of 27973967 is 76937972.

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 27973967 - 2² = 27973963 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 (27973963) 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, 1998134 + ... + 1998147.

It is an arithmetic number, because the mean of its divisors is an integer number (7992564).

Almost surely, 2^27973967 is an apocalyptic number.

27973967 is a deficient number, since it is larger than the sum of its proper divisors (3996289).

27973967 is an equidigital number, since it uses as much as digits as its factorization.

27973967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3996288.

The product of its digits is 1000188, while the sum is 50.

The square root of 27973967 is about 5289.0421628117. The cubic root of 27973967 is about 303.5647590533.

The spelling of 27973967 in words is "twenty-seven million, nine hundred seventy-three thousand, nine hundred sixty-seven".