647170427 has 2 divisors, whose sum is σ = 647170428. Its totient is φ = 647170426.

The previous prime is 647170393. The next prime is 647170453. The reversal of 647170427 is 724071746.

647170427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647170427 - 2¹⁰ = 647169403 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (647170627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323585213 + 323585214.

It is an arithmetic number, because the mean of its divisors is an integer number (323585214).

Almost surely, 2^647170427 is an apocalyptic number.

647170427 is a deficient number, since it is larger than the sum of its proper divisors (1).

647170427 is an equidigital number, since it uses as much as digits as its factorization.

647170427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 647170427 is about 25439.5445517407. The cubic root of 647170427 is about 864.9803093962.

The spelling of 647170427 in words is "six hundred forty-seven million, one hundred seventy thousand, four hundred twenty-seven".