801419809 has 2 divisors, whose sum is σ = 801419810. Its totient is φ = 801419808.

The previous prime is 801419789. The next prime is 801419869. The reversal of 801419809 is 908914108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 801059809 + 360000 = 28303^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 801419809 - 2⁵ = 801419777 is a prime.

It is not a weakly prime, because it can be changed into another prime (801419869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400709904 + 400709905.

It is an arithmetic number, because the mean of its divisors is an integer number (400709905).

Almost surely, 2^801419809 is an apocalyptic number.

It is an amenable number.

801419809 is a deficient number, since it is larger than the sum of its proper divisors (1).

801419809 is an equidigital number, since it uses as much as digits as its factorization.

801419809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 801419809 is about 28309.3590354851. The cubic root of 801419809 is about 928.8666229543.

The spelling of 801419809 in words is "eight hundred one million, four hundred nineteen thousand, eight hundred nine".