27731089 has 4 divisors (see below), whose sum is σ = 29190640. Its totient is φ = 26271540.

The previous prime is 27731069. The next prime is 27731101. The reversal of 27731089 is 98013772.

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 27731089 - 2⁵ = 27731057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27731009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729747 + ... + 729784.

It is an arithmetic number, because the mean of its divisors is an integer number (7297660).

Almost surely, 2^27731089 is an apocalyptic number.

It is an amenable number.

27731089 is a deficient number, since it is larger than the sum of its proper divisors (1459551).

27731089 is a wasteful number, since it uses less digits than its factorization.

27731089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459550.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 27731089 is about 5266.0316178314. The cubic root of 27731089 is about 302.6836587059.

The spelling of 27731089 in words is "twenty-seven million, seven hundred thirty-one thousand, eighty-nine".