27691697 has 12 divisors (see below), whose sum is σ = 30687888. Its totient is φ = 24967800.

The previous prime is 27691693. The next prime is 27691757. The reversal of 27691697 is 79619672.

It is not a de Polignac number, because 27691697 - 2² = 27691693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27691693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14978 + ... + 16724.

It is an arithmetic number, because the mean of its divisors is an integer number (2557324).

Almost surely, 2^27691697 is an apocalyptic number.

It is an amenable number.

27691697 is a deficient number, since it is larger than the sum of its proper divisors (2996191).

27691697 is a wasteful number, since it uses less digits than its factorization.

27691697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900 (or 1889 counting only the distinct ones).

The product of its digits is 285768, while the sum is 47.

The square root of 27691697 is about 5262.2900908255. The cubic root of 27691697 is about 302.5402701209.

The spelling of 27691697 in words is "twenty-seven million, six hundred ninety-one thousand, six hundred ninety-seven".