27729029 has 2 divisors, whose sum is σ = 27729030. Its totient is φ = 27729028.

The previous prime is 27728993. The next prime is 27729041. The reversal of 27729029 is 92092772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22562500 + 5166529 = 4750^2 + 2273^2 .

It is a cyclic number.

It is not a de Polignac number, because 27729029 - 2⁸ = 27728773 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27728983 and 27729001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27729629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13864514 + 13864515.

It is an arithmetic number, because the mean of its divisors is an integer number (13864515).

Almost surely, 2^27729029 is an apocalyptic number.

It is an amenable number.

27729029 is a deficient number, since it is larger than the sum of its proper divisors (1).

27729029 is an equidigital number, since it uses as much as digits as its factorization.

27729029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 27729029 is about 5265.8360209942. The cubic root of 27729029 is about 302.6761635828.

The spelling of 27729029 in words is "twenty-seven million, seven hundred twenty-nine thousand, twenty-nine".