27982139 has 4 divisors (see below), whose sum is σ = 27993120. Its totient is φ = 27971160.

The previous prime is 27982133. The next prime is 27982147. The reversal of 27982139 is 93128972.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 27982139 - 2¹² = 27978043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27982096 and 27982105.

It is not an unprimeable number, because it can be changed into a prime (27982133) 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, 542 + ... + 7500.

It is an arithmetic number, because the mean of its divisors is an integer number (6998280).

Almost surely, 2^27982139 is an apocalyptic number.

27982139 is a deficient number, since it is larger than the sum of its proper divisors (10981).

27982139 is an equidigital number, since it uses as much as digits as its factorization.

27982139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10980.

The product of its digits is 54432, while the sum is 41.

The square root of 27982139 is about 5289.8146470363. The cubic root of 27982139 is about 303.5943161732.

The spelling of 27982139 in words is "twenty-seven million, nine hundred eighty-two thousand, one hundred thirty-nine".