420892889 has 2 divisors, whose sum is σ = 420892890. Its totient is φ = 420892888.

The previous prime is 420892877. The next prime is 420892891. The reversal of 420892889 is 988298024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295564864 + 125328025 = 17192^2 + 11195^2 .

It is a cyclic number.

It is not a de Polignac number, because 420892889 - 2⁴ = 420892873 is a prime.

Together with 420892891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420892819) 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, 210446444 + 210446445.

It is an arithmetic number, because the mean of its divisors is an integer number (210446445).

Almost surely, 2^420892889 is an apocalyptic number.

It is an amenable number.

420892889 is a deficient number, since it is larger than the sum of its proper divisors (1).

420892889 is an equidigital number, since it uses as much as digits as its factorization.

420892889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 663552, while the sum is 50.

The square root of 420892889 is about 20515.6742272829. The cubic root of 420892889 is about 749.4175560922.

It can be divided in two parts, 42089 and 2889, that multiplied together give a palindrome (121595121).

The spelling of 420892889 in words is "four hundred twenty million, eight hundred ninety-two thousand, eight hundred eighty-nine".