27201891 has 16 divisors (see below), whose sum is σ = 37077120. Its totient is φ = 17734080.

The previous prime is 27201877. The next prime is 27201949. The reversal of 27201891 is 19810272.

It is not a de Polignac number, because 27201891 - 2⁹ = 27201379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27201091) 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 15 ways as a sum of consecutive naturals, for example, 55156 + ... + 55646.

It is an arithmetic number, because the mean of its divisors is an integer number (2317320).

Almost surely, 2^27201891 is an apocalyptic number.

27201891 is a deficient number, since it is larger than the sum of its proper divisors (9875229).

27201891 is a wasteful number, since it uses less digits than its factorization.

27201891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 27201891 is about 5215.5432123605. The cubic root of 27201891 is about 300.7458884091.

The spelling of 27201891 in words is "twenty-seven million, two hundred one thousand, eight hundred ninety-one".