686022853 has 4 divisors (see below), whose sum is σ = 686390220. Its totient is φ = 685655488.

The previous prime is 686022787. The next prime is 686022871. The reversal of 686022853 is 358220686.

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 469285569 + 216737284 = 21663^2 + 14722^2 .

It is a cyclic number.

It is not a de Polignac number, because 686022853 - 2¹⁷ = 685891781 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 (686022893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180868 + ... + 184621.

It is an arithmetic number, because the mean of its divisors is an integer number (171597555).

Almost surely, 2^686022853 is an apocalyptic number.

It is an amenable number.

686022853 is a deficient number, since it is larger than the sum of its proper divisors (367367).

686022853 is a wasteful number, since it uses less digits than its factorization.

686022853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367366.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 686022853 is about 26192.0379695815. The cubic root of 686022853 is about 881.9545283468.

The spelling of 686022853 in words is "six hundred eighty-six million, twenty-two thousand, eight hundred fifty-three".