27072973 has 4 divisors (see below), whose sum is σ = 27085500. Its totient is φ = 27060448.

The previous prime is 27072961. The next prime is 27072989. The reversal of 27072973 is 37927072.

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 can be written as a sum of positive squares in 2 ways, for example, as 4052169 + 23020804 = 2013^2 + 4798^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27072973 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 (27072953) 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, 2098 + ... + 7651.

It is an arithmetic number, because the mean of its divisors is an integer number (6771375).

Almost surely, 2^27072973 is an apocalyptic number.

It is an amenable number.

27072973 is a deficient number, since it is larger than the sum of its proper divisors (12527).

27072973 is an equidigital number, since it uses as much as digits as its factorization.

27072973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12526.

The product of its (nonzero) digits is 37044, while the sum is 37.

The square root of 27072973 is about 5203.1695148246. The cubic root of 27072973 is about 300.2700272484.

The spelling of 27072973 in words is "twenty-seven million, seventy-two thousand, nine hundred seventy-three".