856338853 has 2 divisors, whose sum is σ = 856338854. Its totient is φ = 856338852.

The previous prime is 856338799. The next prime is 856338871. The reversal of 856338853 is 358833658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 849897409 + 6441444 = 29153^2 + 2538^2 .

It is a cyclic number.

It is not a de Polignac number, because 856338853 - 2²¹ = 854241701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 856338797 and 856338806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856338053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428169426 + 428169427.

It is an arithmetic number, because the mean of its divisors is an integer number (428169427).

Almost surely, 2^856338853 is an apocalyptic number.

It is an amenable number.

856338853 is a deficient number, since it is larger than the sum of its proper divisors (1).

856338853 is an equidigital number, since it uses as much as digits as its factorization.

856338853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2073600, while the sum is 49.

The square root of 856338853 is about 29263.2679822333. The cubic root of 856338853 is about 949.6171506265.

The spelling of 856338853 in words is "eight hundred fifty-six million, three hundred thirty-eight thousand, eight hundred fifty-three".