804381643 has 4 divisors (see below), whose sum is σ = 866257168. Its totient is φ = 742506120.

The previous prime is 804381637. The next prime is 804381647. The reversal of 804381643 is 346183408.

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-804381643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (804381647) 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, 30937743 + ... + 30937768.

It is an arithmetic number, because the mean of its divisors is an integer number (216564292).

Almost surely, 2^804381643 is an apocalyptic number.

804381643 is a deficient number, since it is larger than the sum of its proper divisors (61875525).

804381643 is a wasteful number, since it uses less digits than its factorization.

804381643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61875524.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 804381643 is about 28361.6227145063. The cubic root of 804381643 is about 930.0094973401.

The spelling of 804381643 in words is "eight hundred four million, three hundred eighty-one thousand, six hundred forty-three".