27995983 has 4 divisors (see below), whose sum is σ = 28333368. Its totient is φ = 27658600.

The previous prime is 27995977. The next prime is 27995999. The reversal of 27995983 is 38959972.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27995983 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 27995983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27995963) 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, 168568 + ... + 168733.

It is an arithmetic number, because the mean of its divisors is an integer number (7083342).

Almost surely, 2^27995983 is an apocalyptic number.

27995983 is a deficient number, since it is larger than the sum of its proper divisors (337385).

27995983 is an equidigital number, since it uses as much as digits as its factorization.

27995983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337384.

The product of its digits is 1224720, while the sum is 52.

The square root of 27995983 is about 5291.1230376925. The cubic root of 27995983 is about 303.6443750908.

The spelling of 27995983 in words is "twenty-seven million, nine hundred ninety-five thousand, nine hundred eighty-three".