420353489 has 2 divisors, whose sum is σ = 420353490. Its totient is φ = 420353488.

The previous prime is 420353449. The next prime is 420353513. The reversal of 420353489 is 984353024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 308353600 + 111999889 = 17560^2 + 10583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420353489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420353449) 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, 210176744 + 210176745.

It is an arithmetic number, because the mean of its divisors is an integer number (210176745).

Almost surely, 2^420353489 is an apocalyptic number.

It is an amenable number.

420353489 is a deficient number, since it is larger than the sum of its proper divisors (1).

420353489 is an equidigital number, since it uses as much as digits as its factorization.

420353489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 420353489 is about 20502.5239665754. The cubic root of 420353489 is about 749.0972777445.

The spelling of 420353489 in words is "four hundred twenty million, three hundred fifty-three thousand, four hundred eighty-nine".