27681109 has 16 divisors (see below), whose sum is σ = 30320640. Its totient is φ = 25200000.

The previous prime is 27681077. The next prime is 27681113. The reversal of 27681109 is 90118672.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 27681109 - 2⁵ = 27681077 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 (27601109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36484 + ... + 37234.

It is an arithmetic number, because the mean of its divisors is an integer number (1895040).

Almost surely, 2^27681109 is an apocalyptic number.

27681109 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

27681109 is a deficient number, since it is larger than the sum of its proper divisors (2639531).

27681109 is a wasteful number, since it uses less digits than its factorization.

27681109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 27681109 is about 5261.2839687666. The cubic root of 27681109 is about 302.5017061580.

The spelling of 27681109 in words is "twenty-seven million, six hundred eighty-one thousand, one hundred nine".