805361005 has 8 divisors (see below), whose sum is σ = 970582392. Its totient is φ = 641522688.

The previous prime is 805361003. The next prime is 805361041. The reversal of 805361005 is 500163508.

It can be written as a sum of positive squares in 4 ways, for example, as 134861769 + 670499236 = 11613^2 + 25894^2 .

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 805361005 - 2¹ = 805361003 is a prime.

It is a super-2 number, since 2×805361005² = 1297212696749220050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805361003) 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, 344484 + ... + 346813.

It is an arithmetic number, because the mean of its divisors is an integer number (121322799).

Almost surely, 2^805361005 is an apocalyptic number.

It is an amenable number.

805361005 is a deficient number, since it is larger than the sum of its proper divisors (165221387).

805361005 is a wasteful number, since it uses less digits than its factorization.

805361005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691535.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 805361005 is about 28378.8830823202. The cubic root of 805361005 is about 930.3867836566.

The spelling of 805361005 in words is "eight hundred five million, three hundred sixty-one thousand, five".