27881291 has 2 divisors, whose sum is σ = 27881292. Its totient is φ = 27881290.

The previous prime is 27881279. The next prime is 27881323. The reversal of 27881291 is 19218872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27881291 - 2¹⁰ = 27880267 is a prime.

It is not a weakly prime, because it can be changed into another prime (27881201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13940645 + 13940646.

It is an arithmetic number, because the mean of its divisors is an integer number (13940646).

Almost surely, 2^27881291 is an apocalyptic number.

27881291 is a deficient number, since it is larger than the sum of its proper divisors (1).

27881291 is an equidigital number, since it uses as much as digits as its factorization.

27881291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 38.

The square root of 27881291 is about 5280.2737618423. The cubic root of 27881291 is about 303.2291578290.

The spelling of 27881291 in words is "twenty-seven million, eight hundred eighty-one thousand, two hundred ninety-one".