420442341509 has 2 divisors, whose sum is σ = 420442341510. Its totient is φ = 420442341508.

The previous prime is 420442341433. The next prime is 420442341547. The reversal of 420442341509 is 905143244024.

It is a happy number.

It is an a-pointer prime, because the next prime (420442341547) can be obtained adding 420442341509 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 367353573409 + 53088768100 = 606097^2 + 230410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420442341509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420442341569) 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, 210221170754 + 210221170755.

It is an arithmetic number, because the mean of its divisors is an integer number (210221170755).

Almost surely, 2^420442341509 is an apocalyptic number.

It is an amenable number.

420442341509 is a deficient number, since it is larger than the sum of its proper divisors (1).

420442341509 is an equidigital number, since it uses as much as digits as its factorization.

420442341509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 420442341509 in words is "four hundred twenty billion, four hundred forty-two million, three hundred forty-one thousand, five hundred nine".