27668509 has 4 divisors (see below), whose sum is σ = 30183840. Its totient is φ = 25153180.

The previous prime is 27668507. The next prime is 27668513. The reversal of 27668509 is 90586672.

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 27668509 - 2¹ = 27668507 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 (27668507) 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, 1257649 + ... + 1257670.

It is an arithmetic number, because the mean of its divisors is an integer number (7545960).

Almost surely, 2^27668509 is an apocalyptic number.

It is an amenable number.

27668509 is a deficient number, since it is larger than the sum of its proper divisors (2515331).

27668509 is a wasteful number, since it uses less digits than its factorization.

27668509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515330.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 27668509 is about 5260.0864061344. The cubic root of 27668509 is about 302.4558012058.

The spelling of 27668509 in words is "twenty-seven million, six hundred sixty-eight thousand, five hundred nine".