27121139 has 4 divisors (see below), whose sum is σ = 27199200. Its totient is φ = 27043080.

The previous prime is 27121123. The next prime is 27121141. The reversal of 27121139 is 93112172.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27121139 - 2⁴ = 27121123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27121639) 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 3 ways as a sum of consecutive naturals, for example, 38507 + ... + 39204.

It is an arithmetic number, because the mean of its divisors is an integer number (6799800).

Almost surely, 2^27121139 is an apocalyptic number.

27121139 is a deficient number, since it is larger than the sum of its proper divisors (78061).

27121139 is an equidigital number, since it uses as much as digits as its factorization.

27121139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78060.

The product of its digits is 756, while the sum is 26.

The square root of 27121139 is about 5207.7959829471. The cubic root of 27121139 is about 300.4479936356.

The spelling of 27121139 in words is "twenty-seven million, one hundred twenty-one thousand, one hundred thirty-nine".