27942473 has 4 divisors (see below), whose sum is σ = 30091908. Its totient is φ = 25793040.

The previous prime is 27942463. The next prime is 27942479. The reversal of 27942473 is 37424972.

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 1646089 + 26296384 = 1283^2 + 5128^2 .

It is not a de Polignac number, because 27942473 - 2¹⁰ = 27941449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27942479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074698 + ... + 1074723.

It is an arithmetic number, because the mean of its divisors is an integer number (7522977).

Almost surely, 2^27942473 is an apocalyptic number.

It is an amenable number.

27942473 is a deficient number, since it is larger than the sum of its proper divisors (2149435).

27942473 is a wasteful number, since it uses less digits than its factorization.

27942473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149434.

The product of its digits is 84672, while the sum is 38.

The square root of 27942473 is about 5286.0640366912. The cubic root of 27942473 is about 303.4507952551.

The spelling of 27942473 in words is "twenty-seven million, nine hundred forty-two thousand, four hundred seventy-three".