27802889 has 2 divisors, whose sum is σ = 27802890. Its totient is φ = 27802888.

The previous prime is 27802847. The next prime is 27802921. The reversal of 27802889 is 98820872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25603600 + 2199289 = 5060^2 + 1483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27802889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27802829) 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, 13901444 + 13901445.

It is an arithmetic number, because the mean of its divisors is an integer number (13901445).

Almost surely, 2^27802889 is an apocalyptic number.

It is an amenable number.

27802889 is a deficient number, since it is larger than the sum of its proper divisors (1).

27802889 is an equidigital number, since it uses as much as digits as its factorization.

27802889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 27802889 is about 5272.8444885090. The cubic root of 27802889 is about 302.9446648906.

The spelling of 27802889 in words is "twenty-seven million, eight hundred two thousand, eight hundred eighty-nine".