27945193 has 2 divisors, whose sum is σ = 27945194. Its totient is φ = 27945192.

The previous prime is 27945179. The next prime is 27945217. The reversal of 27945193 is 39154972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25836889 + 2108304 = 5083^2 + 1452^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27945193 is a prime.

It is not a weakly prime, because it can be changed into another prime (27945493) 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 as a sum of consecutive naturals, namely, 13972596 + 13972597.

It is an arithmetic number, because the mean of its divisors is an integer number (13972597).

Almost surely, 2^27945193 is an apocalyptic number.

It is an amenable number.

27945193 is a deficient number, since it is larger than the sum of its proper divisors (1).

27945193 is an equidigital number, since it uses as much as digits as its factorization.

27945193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 27945193 is about 5286.3213107037. The cubic root of 27945193 is about 303.4606411908.

The spelling of 27945193 in words is "twenty-seven million, nine hundred forty-five thousand, one hundred ninety-three".