804638137 has 2 divisors, whose sum is σ = 804638138. Its totient is φ = 804638136.

The previous prime is 804638099. The next prime is 804638207. The reversal of 804638137 is 731836408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529874361 + 274763776 = 23019^2 + 16576^2 .

It is a cyclic number.

It is not a de Polignac number, because 804638137 - 2²⁷ = 670420409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 804638137.

It is not a weakly prime, because it can be changed into another prime (804635137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402319068 + 402319069.

It is an arithmetic number, because the mean of its divisors is an integer number (402319069).

Almost surely, 2^804638137 is an apocalyptic number.

It is an amenable number.

804638137 is a deficient number, since it is larger than the sum of its proper divisors (1).

804638137 is an equidigital number, since it uses as much as digits as its factorization.

804638137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 804638137 is about 28366.1442039626. The cubic root of 804638137 is about 930.1083378627.

The spelling of 804638137 in words is "eight hundred four million, six hundred thirty-eight thousand, one hundred thirty-seven".