412005809 has 4 divisors (see below), whose sum is σ = 414533616. Its totient is φ = 409478004.

The previous prime is 412005787. The next prime is 412005821. The reversal of 412005809 is 908500214.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 908500214 = 2 ⋅454250107.

It is a cyclic number.

It is not a de Polignac number, because 412005809 - 2¹² = 412001713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (412005109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1263659 + ... + 1263984.

It is an arithmetic number, because the mean of its divisors is an integer number (103633404).

Almost surely, 2^412005809 is an apocalyptic number.

It is an amenable number.

412005809 is a deficient number, since it is larger than the sum of its proper divisors (2527807).

412005809 is a wasteful number, since it uses less digits than its factorization.

412005809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2527806.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 412005809 is about 20297.9262241245. The cubic root of 412005809 is about 744.1053832157.

The spelling of 412005809 in words is "four hundred twelve million, five thousand, eight hundred nine".