27994109 has 16 divisors (see below), whose sum is σ = 33117504. Its totient is φ = 23328000.

The previous prime is 27994081. The next prime is 27994111. The reversal of 27994109 is 90149972.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27994109 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 (27994609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22709 + ... + 23909.

It is an arithmetic number, because the mean of its divisors is an integer number (2069844).

Almost surely, 2^27994109 is an apocalyptic number.

It is an amenable number.

27994109 is a deficient number, since it is larger than the sum of its proper divisors (5123395).

27994109 is a wasteful number, since it uses less digits than its factorization.

27994109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 27994109 is about 5290.9459456698. The cubic root of 27994109 is about 303.6375998062.

The spelling of 27994109 in words is "twenty-seven million, nine hundred ninety-four thousand, one hundred nine".