805458409 has 4 divisors (see below), whose sum is σ = 920523904. Its totient is φ = 690392916.

The previous prime is 805458377. The next prime is 805458481. The reversal of 805458409 is 904854508.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 805458409 - 2⁵ = 805458377 is a prime.

It is a super-2 number, since 2×805458409² = 1297526497257622562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (805458509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57532737 + ... + 57532750.

It is an arithmetic number, because the mean of its divisors is an integer number (230130976).

Almost surely, 2^805458409 is an apocalyptic number.

It is an amenable number.

805458409 is a deficient number, since it is larger than the sum of its proper divisors (115065495).

805458409 is a wasteful number, since it uses less digits than its factorization.

805458409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115065494.

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 805458409 is about 28380.5991656272. The cubic root of 805458409 is about 930.4242905388.

The spelling of 805458409 in words is "eight hundred five million, four hundred fifty-eight thousand, four hundred nine".