853138773 has 6 divisors (see below), whose sum is σ = 1232311574. Its totient is φ = 568759176.

The previous prime is 853138763. The next prime is 853138777. The reversal of 853138773 is 377831358.

It can be written as a sum of positive squares in only one way, i.e., 832726449 + 20412324 = 28857^2 + 4518^2 .

It is not a de Polignac number, because 853138773 - 2⁹ = 853138261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853138777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47396590 + ... + 47396607.

Almost surely, 2^853138773 is an apocalyptic number.

It is an amenable number.

853138773 is a deficient number, since it is larger than the sum of its proper divisors (379172801).

853138773 is a wasteful number, since it uses less digits than its factorization.

853138773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94793203 (or 94793200 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 853138773 is about 29208.5393849128. The cubic root of 853138773 is about 948.4327892236.

The spelling of 853138773 in words is "eight hundred fifty-three million, one hundred thirty-eight thousand, seven hundred seventy-three".