857790673 has 2 divisors, whose sum is σ = 857790674. Its totient is φ = 857790672.

The previous prime is 857790667. The next prime is 857790763. The reversal of 857790673 is 376097758.

It is a happy number.

Together with next prime (857790763) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 835672464 + 22118209 = 28908^2 + 4703^2 .

It is a cyclic number.

It is not a de Polignac number, because 857790673 - 2⁹ = 857790161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 857790673.

It is not a weakly prime, because it can be changed into another prime (857790613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428895336 + 428895337.

It is an arithmetic number, because the mean of its divisors is an integer number (428895337).

Almost surely, 2^857790673 is an apocalyptic number.

It is an amenable number.

857790673 is a deficient number, since it is larger than the sum of its proper divisors (1).

857790673 is an equidigital number, since it uses as much as digits as its factorization.

857790673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2222640, while the sum is 52.

The square root of 857790673 is about 29288.0636608158. The cubic root of 857790673 is about 950.1535016962.

The spelling of 857790673 in words is "eight hundred fifty-seven million, seven hundred ninety thousand, six hundred seventy-three".