420619489 has 2 divisors, whose sum is σ = 420619490. Its totient is φ = 420619488.

The previous prime is 420619483. The next prime is 420619499. The reversal of 420619489 is 984916024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 418611600 + 2007889 = 20460^2 + 1417^2 .

It is a cyclic number.

It is not a de Polignac number, because 420619489 - 2³ = 420619481 is a prime.

It is a super-2 number, since 2×420619489² = 353841509053242242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420619481) 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, 210309744 + 210309745.

It is an arithmetic number, because the mean of its divisors is an integer number (210309745).

Almost surely, 2^420619489 is an apocalyptic number.

It is an amenable number.

420619489 is a deficient number, since it is larger than the sum of its proper divisors (1).

420619489 is an equidigital number, since it uses as much as digits as its factorization.

420619489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 420619489 is about 20509.0099468502. The cubic root of 420619489 is about 749.2552541979.

The spelling of 420619489 in words is "four hundred twenty million, six hundred nineteen thousand, four hundred eighty-nine".