27936121 has 4 divisors (see below), whose sum is σ = 28250100. Its totient is φ = 27622144.

The previous prime is 27936113. The next prime is 27936131. The reversal of 27936121 is 12163972.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19316025 + 8620096 = 4395^2 + 2936^2 .

It is a cyclic number.

It is not a de Polignac number, because 27936121 - 2³ = 27936113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27936101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156856 + ... + 157033.

It is an arithmetic number, because the mean of its divisors is an integer number (7062525).

Almost surely, 2^27936121 is an apocalyptic number.

It is an amenable number.

27936121 is a deficient number, since it is larger than the sum of its proper divisors (313979).

27936121 is an equidigital number, since it uses as much as digits as its factorization.

27936121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313978.

The product of its digits is 4536, while the sum is 31.

The square root of 27936121 is about 5285.4631774330. The cubic root of 27936121 is about 303.4277996106.

The spelling of 27936121 in words is "twenty-seven million, nine hundred thirty-six thousand, one hundred twenty-one".