420313609 has 2 divisors, whose sum is σ = 420313610. Its totient is φ = 420313608.

The previous prime is 420313603. The next prime is 420313643. The reversal of 420313609 is 906313024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285103225 + 135210384 = 16885^2 + 11628^2 .

It is a cyclic number.

It is not a de Polignac number, because 420313609 - 2³ = 420313601 is a prime.

It is not a weakly prime, because it can be changed into another prime (420313601) 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, 210156804 + 210156805.

It is an arithmetic number, because the mean of its divisors is an integer number (210156805).

Almost surely, 2^420313609 is an apocalyptic number.

It is an amenable number.

420313609 is a deficient number, since it is larger than the sum of its proper divisors (1).

420313609 is an equidigital number, since it uses as much as digits as its factorization.

420313609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 420313609 is about 20501.5513803224. The cubic root of 420313609 is about 749.0735874100.

The spelling of 420313609 in words is "four hundred twenty million, three hundred thirteen thousand, six hundred nine".