805841345 has 4 divisors (see below), whose sum is σ = 967009620. Its totient is φ = 644673072.

The previous prime is 805841329. The next prime is 805841359. The reversal of 805841345 is 543148508.

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

It can be written as a sum of positive squares in 2 ways, for example, as 419758144 + 386083201 = 20488^2 + 19649^2 .

It is a cyclic number.

It is not a de Polignac number, because 805841345 - 2⁴ = 805841329 is a prime.

It is a super-2 number, since 2×805841345² = 1298760546622818050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 805841299 and 805841308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80584130 + ... + 80584139.

It is an arithmetic number, because the mean of its divisors is an integer number (241752405).

Almost surely, 2^805841345 is an apocalyptic number.

It is an amenable number.

805841345 is a deficient number, since it is larger than the sum of its proper divisors (161168275).

805841345 is a wasteful number, since it uses less digits than its factorization.

805841345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161168274.

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 805841345 is about 28387.3448036268. The cubic root of 805841345 is about 930.5717165277.

The spelling of 805841345 in words is "eight hundred five million, eight hundred forty-one thousand, three hundred forty-five".