420343109 has 2 divisors, whose sum is σ = 420343110. Its totient is φ = 420343108.

The previous prime is 420343093. The next prime is 420343127. The reversal of 420343109 is 901343024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 324792484 + 95550625 = 18022^2 + 9775^2 .

It is a cyclic number.

It is not a de Polignac number, because 420343109 - 2⁴ = 420343093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420343409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210171554 + 210171555.

It is an arithmetic number, because the mean of its divisors is an integer number (210171555).

Almost surely, 2^420343109 is an apocalyptic number.

It is an amenable number.

420343109 is a deficient number, since it is larger than the sum of its proper divisors (1).

420343109 is an equidigital number, since it uses as much as digits as its factorization.

420343109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 420343109 is about 20502.2708254476. The cubic root of 420343109 is about 749.0911117485.

The spelling of 420343109 in words is "four hundred twenty million, three hundred forty-three thousand, one hundred nine".