27397791 has 16 divisors (see below), whose sum is σ = 42726400. Its totient is φ = 17303544.

The previous prime is 27397739. The next prime is 27397801. The reversal of 27397791 is 19779372.

It is not a de Polignac number, because 27397791 - 2¹⁰ = 27396767 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 (27397291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26191 + ... + 27216.

It is an arithmetic number, because the mean of its divisors is an integer number (2670400).

Almost surely, 2^27397791 is an apocalyptic number.

27397791 is a deficient number, since it is larger than the sum of its proper divisors (15328609).

27397791 is a wasteful number, since it uses less digits than its factorization.

27397791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53435 (or 53429 counting only the distinct ones).

The product of its digits is 166698, while the sum is 45.

The square root of 27397791 is about 5234.2899231892. The cubic root of 27397791 is about 301.4661232698.

The spelling of 27397791 in words is "twenty-seven million, three hundred ninety-seven thousand, seven hundred ninety-one".