420453771449 has 2 divisors, whose sum is σ = 420453771450. Its totient is φ = 420453771448.

The previous prime is 420453771421. The next prime is 420453771571. The reversal of 420453771449 is 944177354024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343990461049 + 76463310400 = 586507^2 + 276520^2 .

It is a cyclic number.

It is not a de Polignac number, because 420453771449 - 2³² = 416158804153 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 420453771397 and 420453771406.

It is not a weakly prime, because it can be changed into another prime (420453771149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210226885724 + 210226885725.

It is an arithmetic number, because the mean of its divisors is an integer number (210226885725).

Almost surely, 2^420453771449 is an apocalyptic number.

It is an amenable number.

420453771449 is a deficient number, since it is larger than the sum of its proper divisors (1).

420453771449 is an equidigital number, since it uses as much as digits as its factorization.

420453771449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3386880, while the sum is 50.

The spelling of 420453771449 in words is "four hundred twenty billion, four hundred fifty-three million, seven hundred seventy-one thousand, four hundred forty-nine".