420318289 has 2 divisors, whose sum is σ = 420318290. Its totient is φ = 420318288.

The previous prime is 420318233. The next prime is 420318317. The reversal of 420318289 is 982813024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 369908289 + 50410000 = 19233^2 + 7100^2 .

It is a cyclic number.

It is not a de Polignac number, because 420318289 - 2⁷ = 420318161 is a prime.

It is not a weakly prime, because it can be changed into another prime (420318089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210159144 + 210159145.

It is an arithmetic number, because the mean of its divisors is an integer number (210159145).

Almost surely, 2^420318289 is an apocalyptic number.

It is an amenable number.

420318289 is a deficient number, since it is larger than the sum of its proper divisors (1).

420318289 is an equidigital number, since it uses as much as digits as its factorization.

420318289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 420318289 is about 20501.6655177086. The cubic root of 420318289 is about 749.0763675971.

The spelling of 420318289 in words is "four hundred twenty million, three hundred eighteen thousand, two hundred eighty-nine".