27081973 has 4 divisors (see below), whose sum is σ = 28507360. Its totient is φ = 25656588.

The previous prime is 27081949. The next prime is 27081979. The reversal of 27081973 is 37918072.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27081973 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 (27081979) 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, 712665 + ... + 712702.

It is an arithmetic number, because the mean of its divisors is an integer number (7126840).

Almost surely, 2^27081973 is an apocalyptic number.

It is an amenable number.

27081973 is a deficient number, since it is larger than the sum of its proper divisors (1425387).

27081973 is a wasteful number, since it uses less digits than its factorization.

27081973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425386.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 27081973 is about 5204.0343004250. The cubic root of 27081973 is about 300.3032969702.

The spelling of 27081973 in words is "twenty-seven million, eighty-one thousand, nine hundred seventy-three".