27697851 has 6 divisors (see below), whose sum is σ = 40008020. Its totient is φ = 18465228.

The previous prime is 27697841. The next prime is 27697897. The reversal of 27697851 is 15879672.

It is not a de Polignac number, because 27697851 - 2⁹ = 27697339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27697797 and 27697806.

It is not an unprimeable number, because it can be changed into a prime (27697841) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1538761 + ... + 1538778.

Almost surely, 2^27697851 is an apocalyptic number.

27697851 is a deficient number, since it is larger than the sum of its proper divisors (12310169).

27697851 is a wasteful number, since it uses less digits than its factorization.

27697851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3077545 (or 3077542 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 27697851 is about 5262.8747847541. The cubic root of 27697851 is about 302.5626799058.

The spelling of 27697851 in words is "twenty-seven million, six hundred ninety-seven thousand, eight hundred fifty-one".