27391983 has 4 divisors (see below), whose sum is σ = 36522648. Its totient is φ = 18261320.

The previous prime is 27391967. The next prime is 27391993. The reversal of 27391983 is 38919372.

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 27391983 - 2⁴ = 27391967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27391933) 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, 4565328 + ... + 4565333.

It is an arithmetic number, because the mean of its divisors is an integer number (9130662).

Almost surely, 2^27391983 is an apocalyptic number.

27391983 is a deficient number, since it is larger than the sum of its proper divisors (9130665).

27391983 is an equidigital number, since it uses as much as digits as its factorization.

27391983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9130664.

The product of its digits is 81648, while the sum is 42.

The square root of 27391983 is about 5233.7350907359. The cubic root of 27391983 is about 301.4448193749. Note that the first 3 decimals are identical.

The spelling of 27391983 in words is "twenty-seven million, three hundred ninety-one thousand, nine hundred eighty-three".