805439499 has 4 divisors (see below), whose sum is σ = 1073919336. Its totient is φ = 536959664.

The previous prime is 805439473. The next prime is 805439513. The reversal of 805439499 is 994934508.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 805439499 - 2¹⁵ = 805406731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (805439419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134239914 + ... + 134239919.

It is an arithmetic number, because the mean of its divisors is an integer number (268479834).

Almost surely, 2^805439499 is an apocalyptic number.

805439499 is a deficient number, since it is larger than the sum of its proper divisors (268479837).

805439499 is a wasteful number, since it uses less digits than its factorization.

805439499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268479836.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The square root of 805439499 is about 28380.2660135524. The cubic root of 805439499 is about 930.4170091940.

The spelling of 805439499 in words is "eight hundred five million, four hundred thirty-nine thousand, four hundred ninety-nine".