419520809 has 2 divisors, whose sum is σ = 419520810. Its totient is φ = 419520808.

The previous prime is 419520767. The next prime is 419520823. The reversal of 419520809 is 908025914.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246019225 + 173501584 = 15685^2 + 13172^2 .

It is a cyclic number.

It is not a de Polignac number, because 419520809 - 2²⁸ = 151085353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (419520859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209760404 + 209760405.

It is an arithmetic number, because the mean of its divisors is an integer number (209760405).

Almost surely, 2^419520809 is an apocalyptic number.

It is an amenable number.

419520809 is a deficient number, since it is larger than the sum of its proper divisors (1).

419520809 is an equidigital number, since it uses as much as digits as its factorization.

419520809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 419520809 is about 20482.2071320451. The cubic root of 419520809 is about 748.6023207936.

The spelling of 419520809 in words is "four hundred nineteen million, five hundred twenty thousand, eight hundred nine".