27947973 has 4 divisors (see below), whose sum is σ = 37263968. Its totient is φ = 18631980.

The previous prime is 27947971. The next prime is 27947981. The reversal of 27947973 is 37974972.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27947973 - 2¹ = 27947971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27947971) 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, 4657993 + ... + 4657998.

It is an arithmetic number, because the mean of its divisors is an integer number (9315992).

Almost surely, 2^27947973 is an apocalyptic number.

It is an amenable number.

27947973 is a deficient number, since it is larger than the sum of its proper divisors (9315995).

27947973 is an equidigital number, since it uses as much as digits as its factorization.

27947973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9315994.

The product of its digits is 666792, while the sum is 48.

The square root of 27947973 is about 5286.5842469406. The cubic root of 27947973 is about 303.4707036562.

It can be divided in two parts, 27947 and 973, that added together give a triangular number (28920 = T₂₄₀).

The spelling of 27947973 in words is "twenty-seven million, nine hundred forty-seven thousand, nine hundred seventy-three".