853866851 has 2 divisors, whose sum is σ = 853866852. Its totient is φ = 853866850.

The previous prime is 853866809. The next prime is 853866857. The reversal of 853866851 is 158668358.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 853866851 - 2¹⁰ = 853865827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 853866851.

It is not a weakly prime, because it can be changed into another prime (853866857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426933425 + 426933426.

It is an arithmetic number, because the mean of its divisors is an integer number (426933426).

Almost surely, 2^853866851 is an apocalyptic number.

853866851 is a deficient number, since it is larger than the sum of its proper divisors (1).

853866851 is an equidigital number, since it uses as much as digits as its factorization.

853866851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382400, while the sum is 50.

The square root of 853866851 is about 29221.0001711098. Note that the first 3 decimals coincide. The cubic root of 853866851 is about 948.7025134963.

The spelling of 853866851 in words is "eight hundred fifty-three million, eight hundred sixty-six thousand, eight hundred fifty-one".