27192191 has 4 divisors (see below), whose sum is σ = 29283912. Its totient is φ = 25100472.

The previous prime is 27192167. The next prime is 27192199. The reversal of 27192191 is 19129172.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27192191 - 2¹⁰ = 27191167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27192199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1045841 + ... + 1045866.

It is an arithmetic number, because the mean of its divisors is an integer number (7320978).

Almost surely, 2^27192191 is an apocalyptic number.

27192191 is a deficient number, since it is larger than the sum of its proper divisors (2091721).

27192191 is a wasteful number, since it uses less digits than its factorization.

27192191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091720.

The product of its digits is 2268, while the sum is 32.

The square root of 27192191 is about 5214.6132167209. The cubic root of 27192191 is about 300.7101362140.

The spelling of 27192191 in words is "twenty-seven million, one hundred ninety-two thousand, one hundred ninety-one".