420303109 has 2 divisors, whose sum is σ = 420303110. Its totient is φ = 420303108.

The previous prime is 420303101. The next prime is 420303137. The reversal of 420303109 is 901303024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 307476225 + 112826884 = 17535^2 + 10622^2 .

It is a cyclic number.

It is not a de Polignac number, because 420303109 - 2³ = 420303101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420303109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420303101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210151554 + 210151555.

It is an arithmetic number, because the mean of its divisors is an integer number (210151555).

Almost surely, 2^420303109 is an apocalyptic number.

It is an amenable number.

420303109 is a deficient number, since it is larger than the sum of its proper divisors (1).

420303109 is an equidigital number, since it uses as much as digits as its factorization.

420303109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 420303109 is about 20501.2953005414. The cubic root of 420303109 is about 749.0673497358.

The spelling of 420303109 in words is "four hundred twenty million, three hundred three thousand, one hundred nine".