853923857 has 2 divisors, whose sum is σ = 853923858. Its totient is φ = 853923856.

The previous prime is 853923841. The next prime is 853923881. The reversal of 853923857 is 758329358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 742072081 + 111851776 = 27241^2 + 10576^2 .

It is a cyclic number.

It is not a de Polignac number, because 853923857 - 2⁴ = 853923841 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (853923827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426961928 + 426961929.

It is an arithmetic number, because the mean of its divisors is an integer number (426961929).

Almost surely, 2^853923857 is an apocalyptic number.

It is an amenable number.

853923857 is a deficient number, since it is larger than the sum of its proper divisors (1).

853923857 is an equidigital number, since it uses as much as digits as its factorization.

853923857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 50.

The square root of 853923857 is about 29221.9755834543. The cubic root of 853923857 is about 948.7236255046.

The spelling of 853923857 in words is "eight hundred fifty-three million, nine hundred twenty-three thousand, eight hundred fifty-seven".