1004380805 has 4 divisors (see below), whose sum is σ = 1205256972. Its totient is φ = 803504640.

The previous prime is 1004380801. The next prime is 1004380837. The reversal of 1004380805 is 5080834001.

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 783888004 + 220492801 = 27998^2 + 14849^2 .

It is not a de Polignac number, because 1004380805 - 2² = 1004380801 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 (1004380801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100438076 + ... + 100438085.

It is an arithmetic number, because the mean of its divisors is an integer number (301314243).

Almost surely, 2^1004380805 is an apocalyptic number.

It is an amenable number.

1004380805 is a deficient number, since it is larger than the sum of its proper divisors (200876167).

1004380805 is an equidigital number, since it uses as much as digits as its factorization.

1004380805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200876166.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 1004380805 is about 31691.9675154447. The cubic root of 1004380805 is about 1001.4581411244.

The spelling of 1004380805 in words is "one billion, four million, three hundred eighty thousand, eight hundred five".