27883979 has 4 divisors (see below), whose sum is σ = 28160160. Its totient is φ = 27607800.

The previous prime is 27883969. The next prime is 27883987. The reversal of 27883979 is 97938872.

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-27883979 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 27883979.

It is not an unprimeable number, because it can be changed into a prime (27883939) 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, 137939 + ... + 138140.

It is an arithmetic number, because the mean of its divisors is an integer number (7040040).

Almost surely, 2^27883979 is an apocalyptic number.

27883979 is a deficient number, since it is larger than the sum of its proper divisors (276181).

27883979 is a wasteful number, since it uses less digits than its factorization.

27883979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276180.

The product of its digits is 1524096, while the sum is 53.

The square root of 27883979 is about 5280.5282879651. The cubic root of 27883979 is about 303.2389021624.

The spelling of 27883979 in words is "twenty-seven million, eight hundred eighty-three thousand, nine hundred seventy-nine".