420211717 has 2 divisors, whose sum is σ = 420211718. Its totient is φ = 420211716.

The previous prime is 420211681. The next prime is 420211721. The reversal of 420211717 is 717112024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242549476 + 177662241 = 15574^2 + 13329^2 .

It is a cyclic number.

It is not a de Polignac number, because 420211717 - 2²³ = 411823109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420211691 and 420211700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420211777) 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, 210105858 + 210105859.

It is an arithmetic number, because the mean of its divisors is an integer number (210105859).

Almost surely, 2^420211717 is an apocalyptic number.

It is an amenable number.

420211717 is a deficient number, since it is larger than the sum of its proper divisors (1).

420211717 is an equidigital number, since it uses as much as digits as its factorization.

420211717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 420211717 is about 20499.0662470270. The cubic root of 420211717 is about 749.0130526310.

The spelling of 420211717 in words is "four hundred twenty million, two hundred eleven thousand, seven hundred seventeen".