27001243 has 2 divisors, whose sum is σ = 27001244. Its totient is φ = 27001242.

The previous prime is 27001199. The next prime is 27001259. The reversal of 27001243 is 34210072.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27001243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27001243.

It is not a weakly prime, because it can be changed into another prime (27001283) 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, 13500621 + 13500622.

It is an arithmetic number, because the mean of its divisors is an integer number (13500622).

Almost surely, 2^27001243 is an apocalyptic number.

27001243 is a deficient number, since it is larger than the sum of its proper divisors (1).

27001243 is an equidigital number, since it uses as much as digits as its factorization.

27001243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 27001243 is about 5196.2720290608. The cubic root of 27001243 is about 300.0046036331.

The spelling of 27001243 in words is "twenty-seven million, one thousand, two hundred forty-three".