27420851 has 2 divisors, whose sum is σ = 27420852. Its totient is φ = 27420850.

The previous prime is 27420791. The next prime is 27420859. The reversal of 27420851 is 15802472.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27420851 - 2¹⁴ = 27404467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27420859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13710425 + 13710426.

It is an arithmetic number, because the mean of its divisors is an integer number (13710426).

Almost surely, 2^27420851 is an apocalyptic number.

27420851 is a deficient number, since it is larger than the sum of its proper divisors (1).

27420851 is an equidigital number, since it uses as much as digits as its factorization.

27420851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 27420851 is about 5236.4922419498. The cubic root of 27420851 is about 301.5506782537.

The spelling of 27420851 in words is "twenty-seven million, four hundred twenty thousand, eight hundred fifty-one".