420420430434247 has 2 divisors, whose sum is σ = 420420430434248. Its totient is φ = 420420430434246.

The previous prime is 420420430434239. The next prime is 420420430434287. The reversal of 420420430434247 is 742434034024024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420420430434247 - 2³ = 420420430434239 is a prime.

It is a super-2 number, since 2×420420430434247² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420420430434227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210210215217123 + 210210215217124.

It is an arithmetic number, because the mean of its divisors is an integer number (210210215217124).

Almost surely, 2^{420420430434247} is an apocalyptic number.

420420430434247 is a deficient number, since it is larger than the sum of its proper divisors (1).

420420430434247 is an equidigital number, since it uses as much as digits as its factorization.

420420430434247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2064384, while the sum is 43.

The spelling of 420420430434247 in words is "four hundred twenty trillion, four hundred twenty billion, four hundred thirty million, four hundred thirty-four thousand, two hundred forty-seven".