27355021 has 2 divisors, whose sum is σ = 27355022. Its totient is φ = 27355020.

The previous prime is 27355019. The next prime is 27355039. The reversal of 27355021 is 12055372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24890121 + 2464900 = 4989^2 + 1570^2 .

It is a cyclic number.

It is not a de Polignac number, because 27355021 - 2¹ = 27355019 is a prime.

Together with 27355019, 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 (27355001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13677510 + 13677511.

It is an arithmetic number, because the mean of its divisors is an integer number (13677511).

Almost surely, 2^27355021 is an apocalyptic number.

It is an amenable number.

27355021 is a deficient number, since it is larger than the sum of its proper divisors (1).

27355021 is an equidigital number, since it uses as much as digits as its factorization.

27355021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 27355021 is about 5230.2027685358. The cubic root of 27355021 is about 301.3091711848.

The spelling of 27355021 in words is "twenty-seven million, three hundred fifty-five thousand, twenty-one".