420271889 has 2 divisors, whose sum is σ = 420271890. Its totient is φ = 420271888.

The previous prime is 420271837. The next prime is 420271897. The reversal of 420271889 is 988172024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342250000 + 78021889 = 18500^2 + 8833^2 .

It is a cyclic number.

It is not a de Polignac number, because 420271889 - 2²⁴ = 403494673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420201889) 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, 210135944 + 210135945.

It is an arithmetic number, because the mean of its divisors is an integer number (210135945).

Almost surely, 2^420271889 is an apocalyptic number.

It is an amenable number.

420271889 is a deficient number, since it is larger than the sum of its proper divisors (1).

420271889 is an equidigital number, since it uses as much as digits as its factorization.

420271889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 420271889 is about 20500.5338710971. The cubic root of 420271889 is about 749.0488024372.

The spelling of 420271889 in words is "four hundred twenty million, two hundred seventy-one thousand, eight hundred eighty-nine".