420844867 has 2 divisors, whose sum is σ = 420844868. Its totient is φ = 420844866.

The previous prime is 420844849. The next prime is 420844891. The reversal of 420844867 is 768448024.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420844867 is a prime.

It is a super-3 number, since 3×420844867³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (420844807) 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, 210422433 + 210422434.

It is an arithmetic number, because the mean of its divisors is an integer number (210422434).

Almost surely, 2^420844867 is an apocalyptic number.

420844867 is a deficient number, since it is larger than the sum of its proper divisors (1).

420844867 is an equidigital number, since it uses as much as digits as its factorization.

420844867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 344064, while the sum is 43.

The square root of 420844867 is about 20514.5038204681. The cubic root of 420844867 is about 749.3890532754.

The spelling of 420844867 in words is "four hundred twenty million, eight hundred forty-four thousand, eight hundred sixty-seven".