27439393 has 4 divisors (see below), whose sum is σ = 27623700. Its totient is φ = 27255088.

The previous prime is 27439387. The next prime is 27439403. The reversal of 27439393 is 39393472.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9529569 + 17909824 = 3087^2 + 4232^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27439393 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 (27439193) 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, 91930 + ... + 92227.

It is an arithmetic number, because the mean of its divisors is an integer number (6905925).

Almost surely, 2^27439393 is an apocalyptic number.

It is an amenable number.

27439393 is a deficient number, since it is larger than the sum of its proper divisors (184307).

27439393 is a wasteful number, since it uses less digits than its factorization.

27439393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184306.

The product of its digits is 122472, while the sum is 40.

The square root of 27439393 is about 5238.2624027439. The cubic root of 27439393 is about 301.6186325373.

The spelling of 27439393 in words is "twenty-seven million, four hundred thirty-nine thousand, three hundred ninety-three".