27739147 has 4 divisors (see below), whose sum is σ = 27758376. Its totient is φ = 27719920.

The previous prime is 27739133. The next prime is 27739163. The reversal of 27739147 is 74193772.

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-27739147 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27739847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7258 + ... + 10399.

It is an arithmetic number, because the mean of its divisors is an integer number (6939594).

Almost surely, 2^27739147 is an apocalyptic number.

27739147 is a deficient number, since it is larger than the sum of its proper divisors (19229).

27739147 is a wasteful number, since it uses less digits than its factorization.

27739147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19228.

The product of its digits is 74088, while the sum is 40.

The square root of 27739147 is about 5266.7966545140. The cubic root of 27739147 is about 302.7129734426.

The spelling of 27739147 in words is "twenty-seven million, seven hundred thirty-nine thousand, one hundred forty-seven".