420180889 has 2 divisors, whose sum is σ = 420180890. Its totient is φ = 420180888.

The previous prime is 420180883. The next prime is 420180899. The reversal of 420180889 is 988081024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415833664 + 4347225 = 20392^2 + 2085^2 .

It is a cyclic number.

It is not a de Polignac number, because 420180889 - 2¹¹ = 420178841 is a prime.

It is not a weakly prime, because it can be changed into another prime (420180883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210090444 + 210090445.

It is an arithmetic number, because the mean of its divisors is an integer number (210090445).

Almost surely, 2^420180889 is an apocalyptic number.

It is an amenable number.

420180889 is a deficient number, since it is larger than the sum of its proper divisors (1).

420180889 is an equidigital number, since it uses as much as digits as its factorization.

420180889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 420180889 is about 20498.3142965464. The cubic root of 420180889 is about 748.9947355636.

The spelling of 420180889 in words is "four hundred twenty million, one hundred eighty thousand, eight hundred eighty-nine".