420320449 has 2 divisors, whose sum is σ = 420320450. Its totient is φ = 420320448.

The previous prime is 420320441. The next prime is 420320471. The reversal of 420320449 is 944023024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411278400 + 9042049 = 20280^2 + 3007^2 .

It is a cyclic number.

It is not a de Polignac number, because 420320449 - 2³ = 420320441 is a prime.

It is not a weakly prime, because it can be changed into another prime (420320441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210160224 + 210160225.

It is an arithmetic number, because the mean of its divisors is an integer number (210160225).

Almost surely, 2^420320449 is an apocalyptic number.

It is an amenable number.

420320449 is a deficient number, since it is larger than the sum of its proper divisors (1).

420320449 is an equidigital number, since it uses as much as digits as its factorization.

420320449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 420320449 is about 20501.7181962878. The cubic root of 420320449 is about 749.0776507534.

The spelling of 420320449 in words is "four hundred twenty million, three hundred twenty thousand, four hundred forty-nine".