27949189 has 2 divisors, whose sum is σ = 27949190. Its totient is φ = 27949188.

The previous prime is 27949177. The next prime is 27949211. The reversal of 27949189 is 98194972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17288964 + 10660225 = 4158^2 + 3265^2 .

It is a cyclic number.

It is not a de Polignac number, because 27949189 - 2⁵ = 27949157 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27949169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13974594 + 13974595.

It is an arithmetic number, because the mean of its divisors is an integer number (13974595).

Almost surely, 2^27949189 is an apocalyptic number.

It is an amenable number.

27949189 is a deficient number, since it is larger than the sum of its proper divisors (1).

27949189 is an equidigital number, since it uses as much as digits as its factorization.

27949189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 49.

The square root of 27949189 is about 5286.6992537878. The cubic root of 27949189 is about 303.4751048701.

The spelling of 27949189 in words is "twenty-seven million, nine hundred forty-nine thousand, one hundred eighty-nine".