805308506 has 4 divisors (see below), whose sum is σ = 1207962762. Its totient is φ = 402654252.

The previous prime is 805308473. The next prime is 805308529. The reversal of 805308506 is 605803508.

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

It can be written as a sum of positive squares in only one way, i.e., 537822481 + 267486025 = 23191^2 + 16355^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 201327125 + ... + 201327128.

Almost surely, 2^805308506 is an apocalyptic number.

805308506 is a deficient number, since it is larger than the sum of its proper divisors (402654256).

805308506 is a wasteful number, since it uses less digits than its factorization.

805308506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402654255.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 805308506 is about 28377.9581013152. The cubic root of 805308506 is about 930.3665668690.

The spelling of 805308506 in words is "eight hundred five million, three hundred eight thousand, five hundred six".