805241819 has 4 divisors (see below), whose sum is σ = 805629744. Its totient is φ = 804853896.

The previous prime is 805241813. The next prime is 805241851. The reversal of 805241819 is 918142508.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-805241819 is a prime.

It is a super-2 number, since 2×805241819² = 1296828774132857522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (805241813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190832 + ... + 195005.

It is an arithmetic number, because the mean of its divisors is an integer number (201407436).

Almost surely, 2^805241819 is an apocalyptic number.

805241819 is a deficient number, since it is larger than the sum of its proper divisors (387925).

805241819 is a wasteful number, since it uses less digits than its factorization.

805241819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387924.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 805241819 is about 28376.7830981597. The cubic root of 805241819 is about 930.3408851716.

The spelling of 805241819 in words is "eight hundred five million, two hundred forty-one thousand, eight hundred nineteen".