420300217 has 2 divisors, whose sum is σ = 420300218. Its totient is φ = 420300216.

The previous prime is 420300211. The next prime is 420300233. The reversal of 420300217 is 712003024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 420291001 + 9216 = 20501^2 + 96^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420300217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420300194 and 420300203.

It is not a weakly prime, because it can be changed into another prime (420300211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210150108 + 210150109.

It is an arithmetic number, because the mean of its divisors is an integer number (210150109).

Almost surely, 2^420300217 is an apocalyptic number.

It is an amenable number.

420300217 is a deficient number, since it is larger than the sum of its proper divisors (1).

420300217 is an equidigital number, since it uses as much as digits as its factorization.

420300217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 420300217 is about 20501.2247682913. The cubic root of 420300217 is about 749.0656316838.

The spelling of 420300217 in words is "four hundred twenty million, three hundred thousand, two hundred seventeen".