853257869 has 2 divisors, whose sum is σ = 853257870. Its totient is φ = 853257868.

The previous prime is 853257859. The next prime is 853257913. The reversal of 853257869 is 968752358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 635695369 + 217562500 = 25213^2 + 14750^2 .

It is a cyclic number.

It is not a de Polignac number, because 853257869 - 2²⁴ = 836480653 is a prime.

It is a super-2 number, since 2×853257869² = 1456097982020842322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 853257869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853257859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426628934 + 426628935.

It is an arithmetic number, because the mean of its divisors is an integer number (426628935).

Almost surely, 2^853257869 is an apocalyptic number.

It is an amenable number.

853257869 is a deficient number, since it is larger than the sum of its proper divisors (1).

853257869 is an equidigital number, since it uses as much as digits as its factorization.

853257869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 53.

The square root of 853257869 is about 29210.5780326237. The cubic root of 853257869 is about 948.4769201041.

The spelling of 853257869 in words is "eight hundred fifty-three million, two hundred fifty-seven thousand, eight hundred sixty-nine".