27921793 has 8 divisors (see below), whose sum is σ = 30076416. Its totient is φ = 25845600.

The previous prime is 27921763. The next prime is 27921799. The reversal of 27921793 is 39712972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27921793 - 2⁹ = 27921281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27921799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18868 + ... + 20293.

It is an arithmetic number, because the mean of its divisors is an integer number (3759552).

Almost surely, 2^27921793 is an apocalyptic number.

27921793 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

27921793 is a deficient number, since it is larger than the sum of its proper divisors (2154623).

27921793 is a wasteful number, since it uses less digits than its factorization.

27921793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39215.

The product of its digits is 47628, while the sum is 40.

The square root of 27921793 is about 5284.1075878525. The cubic root of 27921793 is about 303.3759162802.

The spelling of 27921793 in words is "twenty-seven million, nine hundred twenty-one thousand, seven hundred ninety-three".