419090921 has 2 divisors, whose sum is σ = 419090922. Its totient is φ = 419090920.

The previous prime is 419090909. The next prime is 419091017. The reversal of 419090921 is 129090914.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417793600 + 1297321 = 20440^2 + 1139^2 .

It is a cyclic number.

It is not a de Polignac number, because 419090921 - 2¹⁸ = 418828777 is a prime.

It is not a weakly prime, because it can be changed into another prime (419096921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209545460 + 209545461.

It is an arithmetic number, because the mean of its divisors is an integer number (209545461).

Almost surely, 2^419090921 is an apocalyptic number.

It is an amenable number.

419090921 is a deficient number, since it is larger than the sum of its proper divisors (1).

419090921 is an equidigital number, since it uses as much as digits as its factorization.

419090921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 419090921 is about 20471.7102607476. The cubic root of 419090921 is about 748.3465328146.

The spelling of 419090921 in words is "four hundred nineteen million, ninety thousand, nine hundred twenty-one".