419404721 has 2 divisors, whose sum is σ = 419404722. Its totient is φ = 419404720.

The previous prime is 419404709. The next prime is 419404751. The reversal of 419404721 is 127404914.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215943025 + 203461696 = 14695^2 + 14264^2 .

It is a cyclic number.

It is not a de Polignac number, because 419404721 - 2¹⁴ = 419388337 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (419404751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209702360 + 209702361.

It is an arithmetic number, because the mean of its divisors is an integer number (209702361).

Almost surely, 2^419404721 is an apocalyptic number.

It is an amenable number.

419404721 is a deficient number, since it is larger than the sum of its proper divisors (1).

419404721 is an equidigital number, since it uses as much as digits as its factorization.

419404721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 419404721 is about 20479.3730616931. The cubic root of 419404721 is about 748.5332644151.

The spelling of 419404721 in words is "four hundred nineteen million, four hundred four thousand, seven hundred twenty-one".