27676721 has 4 divisors (see below), whose sum is σ = 27816000. Its totient is φ = 27537444.

The previous prime is 27676679. The next prime is 27676739. The reversal of 27676721 is 12767672.

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 not a de Polignac number, because 27676721 - 2⁶ = 27676657 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27676741) 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, 69341 + ... + 69738.

It is an arithmetic number, because the mean of its divisors is an integer number (6954000).

Almost surely, 2^27676721 is an apocalyptic number.

It is an amenable number.

27676721 is a deficient number, since it is larger than the sum of its proper divisors (139279).

27676721 is a wasteful number, since it uses less digits than its factorization.

27676721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139278.

The product of its digits is 49392, while the sum is 38.

The square root of 27676721 is about 5260.8669437651. The cubic root of 27676721 is about 302.4857211574.

The spelling of 27676721 in words is "twenty-seven million, six hundred seventy-six thousand, seven hundred twenty-one".