420846317 has 2 divisors, whose sum is σ = 420846318. Its totient is φ = 420846316.

The previous prime is 420846313. The next prime is 420846331. The reversal of 420846317 is 713648024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338780836 + 82065481 = 18406^2 + 9059^2 .

It is a cyclic number.

It is not a de Polignac number, because 420846317 - 2² = 420846313 is a prime.

It is a super-2 number, since 2×420846317² = 354223245064928978, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420846311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210423158 + 210423159.

It is an arithmetic number, because the mean of its divisors is an integer number (210423159).

Almost surely, 2^420846317 is an apocalyptic number.

It is an amenable number.

420846317 is a deficient number, since it is larger than the sum of its proper divisors (1).

420846317 is an equidigital number, since it uses as much as digits as its factorization.

420846317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 420846317 is about 20514.5391612875. The cubic root of 420846317 is about 749.3899139353.

The spelling of 420846317 in words is "four hundred twenty million, eight hundred forty-six thousand, three hundred seventeen".