27859997 has 4 divisors (see below), whose sum is σ = 30392736. Its totient is φ = 25327260.

The previous prime is 27859987. The next prime is 27859999. The reversal of 27859997 is 79995872.

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 27859997 - 2¹⁶ = 27794461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27859999) 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, 1266353 + ... + 1266374.

It is an arithmetic number, because the mean of its divisors is an integer number (7598184).

Almost surely, 2^27859997 is an apocalyptic number.

It is an amenable number.

27859997 is a deficient number, since it is larger than the sum of its proper divisors (2532739).

27859997 is a wasteful number, since it uses less digits than its factorization.

27859997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532738.

The product of its digits is 2857680, while the sum is 56.

The square root of 27859997 is about 5278.2570039739. The cubic root of 27859997 is about 303.1519422965.

The spelling of 27859997 in words is "twenty-seven million, eight hundred fifty-nine thousand, nine hundred ninety-seven".