27291889 has 2 divisors, whose sum is σ = 27291890. Its totient is φ = 27291888.

The previous prime is 27291863. The next prime is 27291941. The reversal of 27291889 is 98819272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16136289 + 11155600 = 4017^2 + 3340^2 .

It is a cyclic number.

It is not a de Polignac number, because 27291889 - 2¹⁷ = 27160817 is a prime.

It is not a weakly prime, because it can be changed into another prime (27291839) 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 as a sum of consecutive naturals, namely, 13645944 + 13645945.

It is an arithmetic number, because the mean of its divisors is an integer number (13645945).

Almost surely, 2^27291889 is an apocalyptic number.

It is an amenable number.

27291889 is a deficient number, since it is larger than the sum of its proper divisors (1).

27291889 is an equidigital number, since it uses as much as digits as its factorization.

27291889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 46.

The square root of 27291889 is about 5224.1639522511. The cubic root of 27291889 is about 301.0771978900.

The spelling of 27291889 in words is "twenty-seven million, two hundred ninety-one thousand, eight hundred eighty-nine".