805651023 has 4 divisors (see below), whose sum is σ = 1074201368. Its totient is φ = 537100680.

The previous prime is 805650953. The next prime is 805651031. The reversal of 805651023 is 320156508.

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

It is not a de Polignac number, because 805651023 - 2⁸ = 805650767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805651073) 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, 134275168 + ... + 134275173.

It is an arithmetic number, because the mean of its divisors is an integer number (268550342).

Almost surely, 2^805651023 is an apocalyptic number.

805651023 is a deficient number, since it is larger than the sum of its proper divisors (268550345).

805651023 is a wasteful number, since it uses less digits than its factorization.

805651023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268550344.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 805651023 is about 28383.9923724623. The cubic root of 805651023 is about 930.4984505694.

The spelling of 805651023 in words is "eight hundred five million, six hundred fifty-one thousand, twenty-three".