853935235949 has 4 divisors (see below), whose sum is σ = 855375262236. Its totient is φ = 852495209664.

The previous prime is 853935235927. The next prime is 853935235963. The reversal of 853935235949 is 949532539358.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 505404402724 + 348530833225 = 710918^2 + 590365^2 .

It is a cyclic number.

It is not a de Polignac number, because 853935235949 - 2³⁶ = 785215759213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853935235999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720012254 + ... + 720013439.

It is an arithmetic number, because the mean of its divisors is an integer number (213843815559).

Almost surely, 2^853935235949 is an apocalyptic number.

It is an amenable number.

853935235949 is a deficient number, since it is larger than the sum of its proper divisors (1440026287).

853935235949 is a wasteful number, since it uses less digits than its factorization.

853935235949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440026286.

The product of its digits is 157464000, while the sum is 65.

The spelling of 853935235949 in words is "eight hundred fifty-three billion, nine hundred thirty-five million, two hundred thirty-five thousand, nine hundred forty-nine".