805958409 has 8 divisors (see below), whose sum is σ = 1076749632. Its totient is φ = 536236400.

The previous prime is 805958393. The next prime is 805958449. The reversal of 805958409 is 904859508.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 805958409 - 2⁴ = 805958393 is a prime.

It is a super-2 number, since 2×805958409² = 1299137914075622562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (805958449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265542 + ... + 268559.

It is an arithmetic number, because the mean of its divisors is an integer number (134593704).

Almost surely, 2^805958409 is an apocalyptic number.

It is an amenable number.

805958409 is a deficient number, since it is larger than the sum of its proper divisors (270791223).

805958409 is a wasteful number, since it uses less digits than its factorization.

805958409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534607.

The product of its (nonzero) digits is 518400, while the sum is 48.

The square root of 805958409 is about 28389.4066334610. The cubic root of 805958409 is about 930.6167755100.

The spelling of 805958409 in words is "eight hundred five million, nine hundred fifty-eight thousand, four hundred nine".