27993129 has 8 divisors (see below), whose sum is σ = 38192352. Its totient is φ = 18228000.

The previous prime is 27993107. The next prime is 27993157. The reversal of 27993129 is 92139972.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27993129 - 2¹³ = 27984937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27993029) 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 7 ways as a sum of consecutive naturals, for example, 108372 + ... + 108629.

It is an arithmetic number, because the mean of its divisors is an integer number (4774044).

Almost surely, 2^27993129 is an apocalyptic number.

It is an amenable number.

27993129 is a deficient number, since it is larger than the sum of its proper divisors (10199223).

27993129 is a wasteful number, since it uses less digits than its factorization.

27993129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217047.

The product of its digits is 61236, while the sum is 42.

The square root of 27993129 is about 5290.8533338205. The cubic root of 27993129 is about 303.6340565808.

The spelling of 27993129 in words is "twenty-seven million, nine hundred ninety-three thousand, one hundred twenty-nine".