27281029 has 2 divisors, whose sum is σ = 27281030. Its totient is φ = 27281028.

The previous prime is 27281027. The next prime is 27281047. The reversal of 27281029 is 92018272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20232004 + 7049025 = 4498^2 + 2655^2 .

It is a cyclic number.

It is not a de Polignac number, because 27281029 - 2¹ = 27281027 is a prime.

Together with 27281027, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27281027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13640514 + 13640515.

It is an arithmetic number, because the mean of its divisors is an integer number (13640515).

Almost surely, 2^27281029 is an apocalyptic number.

It is an amenable number.

27281029 is a deficient number, since it is larger than the sum of its proper divisors (1).

27281029 is an equidigital number, since it uses as much as digits as its factorization.

27281029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 27281029 is about 5223.1244480675. The cubic root of 27281029 is about 301.0372576699.

The spelling of 27281029 in words is "twenty-seven million, two hundred eighty-one thousand, twenty-nine".