27840929 has 2 divisors, whose sum is σ = 27840930. Its totient is φ = 27840928.

The previous prime is 27840919. The next prime is 27840973. The reversal of 27840929 is 92904872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23261329 + 4579600 = 4823^2 + 2140^2 .

It is a cyclic number.

It is not a de Polignac number, because 27840929 - 2¹² = 27836833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27840919) 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, 13920464 + 13920465.

It is an arithmetic number, because the mean of its divisors is an integer number (13920465).

Almost surely, 2^27840929 is an apocalyptic number.

It is an amenable number.

27840929 is a deficient number, since it is larger than the sum of its proper divisors (1).

27840929 is an equidigital number, since it uses as much as digits as its factorization.

27840929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 27840929 is about 5276.4504167101. The cubic root of 27840929 is about 303.0827652072.

The spelling of 27840929 in words is "twenty-seven million, eight hundred forty thousand, nine hundred twenty-nine".