419789921 has 2 divisors, whose sum is σ = 419789922. Its totient is φ = 419789920.

The previous prime is 419789917. The next prime is 419789927. The reversal of 419789921 is 129987914.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266995600 + 152794321 = 16340^2 + 12361^2 .

It is a cyclic number.

It is not a de Polignac number, because 419789921 - 2² = 419789917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 419789921.

It is not a weakly prime, because it can be changed into another prime (419789927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209894960 + 209894961.

It is an arithmetic number, because the mean of its divisors is an integer number (209894961).

Almost surely, 2^419789921 is an apocalyptic number.

It is an amenable number.

419789921 is a deficient number, since it is larger than the sum of its proper divisors (1).

419789921 is an equidigital number, since it uses as much as digits as its factorization.

419789921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 50.

The square root of 419789921 is about 20488.7754880569. The cubic root of 419789921 is about 748.7623564042.

The spelling of 419789921 in words is "four hundred nineteen million, seven hundred eighty-nine thousand, nine hundred twenty-one".