545670217 has 2 divisors, whose sum is σ = 545670218. Its totient is φ = 545670216.

The previous prime is 545670211. The next prime is 545670259. The reversal of 545670217 is 712076545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 405579321 + 140090896 = 20139^2 + 11836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545670217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (545670211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272835108 + 272835109.

It is an arithmetic number, because the mean of its divisors is an integer number (272835109).

Almost surely, 2^545670217 is an apocalyptic number.

It is an amenable number.

545670217 is a deficient number, since it is larger than the sum of its proper divisors (1).

545670217 is an equidigital number, since it uses as much as digits as its factorization.

545670217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 545670217 is about 23359.5851204597. The cubic root of 545670217 is about 817.1656140997.

The spelling of 545670217 in words is "five hundred forty-five million, six hundred seventy thousand, two hundred seventeen".