6413809 has 2 divisors, whose sum is σ = 6413810. Its totient is φ = 6413808.

The previous prime is 6413801. The next prime is 6413821. The reversal of 6413809 is 9083146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4397409 + 2016400 = 2097^2 + 1420^2 .

It is a cyclic number.

It is not a de Polignac number, because 6413809 - 2³ = 6413801 is a prime.

It is a super-2 number, since 2×6413809² = 82273891776962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6413801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3206904 + 3206905.

It is an arithmetic number, because the mean of its divisors is an integer number (3206905).

Almost surely, 2^6413809 is an apocalyptic number.

It is an amenable number.

6413809 is a deficient number, since it is larger than the sum of its proper divisors (1).

6413809 is an equidigital number, since it uses as much as digits as its factorization.

6413809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 6413809 is about 2532.5499007917. The cubic root of 6413809 is about 185.7969901290.

The spelling of 6413809 in words is "six million, four hundred thirteen thousand, eight hundred nine".