27989093 has 4 divisors (see below), whose sum is σ = 30533568. Its totient is φ = 25444620.

The previous prime is 27989077. The next prime is 27989153. The reversal of 27989093 is 39098972.

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 27989093 - 2⁴ = 27989077 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 (27989893) 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, 1272221 + ... + 1272242.

It is an arithmetic number, because the mean of its divisors is an integer number (7633392).

Almost surely, 2^27989093 is an apocalyptic number.

It is an amenable number.

27989093 is a deficient number, since it is larger than the sum of its proper divisors (2544475).

27989093 is a wasteful number, since it uses less digits than its factorization.

27989093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544474.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 27989093 is about 5290.4719071175. The cubic root of 27989093 is about 303.6194634050.

The spelling of 27989093 in words is "twenty-seven million, nine hundred eighty-nine thousand, ninety-three".