804939939409 has 24 divisors (see below), whose sum is σ = 829989776000. Its totient is φ = 780620976000.

The previous prime is 804939939367. The next prime is 804939939413. The reversal of 804939939409 is 904939939408.

It is not a de Polignac number, because 804939939409 - 2³⁷ = 667500985937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (804939939499) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227318179 + ... + 227321719.

Almost surely, 2^804939939409 is an apocalyptic number.

It is an amenable number.

804939939409 is a deficient number, since it is larger than the sum of its proper divisors (25049836591).

804939939409 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (804939939408) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (4393).

804939939409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4393 (or 4352 counting only the distinct ones).

The product of its (nonzero) digits is 68024448, while the sum is 67.

Subtracting 804939939409 from its reverse (904939939408), we obtain a palindrome (99999999999).

It can be divided in two parts, 8049399 and 39409, that added together give a palindrome (8088808).

The spelling of 804939939409 in words is "eight hundred four billion, nine hundred thirty-nine million, nine hundred thirty-nine thousand, four hundred nine".