27997873 has 4 divisors (see below), whose sum is σ = 28123648. Its totient is φ = 27872100.

The previous prime is 27997829. The next prime is 27997883. The reversal of 27997873 is 37879972.

It is a happy number.

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 27997873 - 2¹³ = 27989681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27997873.

It is not an unprimeable number, because it can be changed into a prime (27997883) 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, 62553 + ... + 62998.

It is an arithmetic number, because the mean of its divisors is an integer number (7030912).

Almost surely, 2^27997873 is an apocalyptic number.

It is an amenable number.

27997873 is a deficient number, since it is larger than the sum of its proper divisors (125775).

27997873 is a wasteful number, since it uses less digits than its factorization.

27997873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125774.

The product of its digits is 1333584, while the sum is 52.

The square root of 27997873 is about 5291.3016357036. The cubic root of 27997873 is about 303.6512079158.

The spelling of 27997873 in words is "twenty-seven million, nine hundred ninety-seven thousand, eight hundred seventy-three".