804000631691 has 2 divisors, whose sum is σ = 804000631692. Its totient is φ = 804000631690.

The previous prime is 804000631663. The next prime is 804000631697. The reversal of 804000631691 is 196136000408.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-804000631691 is a prime.

It is not a weakly prime, because it can be changed into another prime (804000631697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402000315845 + 402000315846.

It is an arithmetic number, because the mean of its divisors is an integer number (402000315846).

Almost surely, 2^804000631691 is an apocalyptic number.

804000631691 is a deficient number, since it is larger than the sum of its proper divisors (1).

804000631691 is an equidigital number, since it uses as much as digits as its factorization.

804000631691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 804000631691 in words is "eight hundred four billion, six hundred thirty-one thousand, six hundred ninety-one".