689833853 has 4 divisors (see below), whose sum is σ = 689993628. Its totient is φ = 689674080.

The previous prime is 689833847. The next prime is 689833861. The reversal of 689833853 is 358338986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 358338986 = 2 ⋅179169493.

It can be written as a sum of positive squares in 2 ways, for example, as 404291449 + 285542404 = 20107^2 + 16898^2 .

It is a cyclic number.

It is not a de Polignac number, because 689833853 - 2⁶ = 689833789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 689833795 and 689833804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689833153) 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, 73226 + ... + 82107.

It is an arithmetic number, because the mean of its divisors is an integer number (172498407).

Almost surely, 2^689833853 is an apocalyptic number.

It is an amenable number.

689833853 is a deficient number, since it is larger than the sum of its proper divisors (159775).

689833853 is a wasteful number, since it uses less digits than its factorization.

689833853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159774.

The product of its digits is 3732480, while the sum is 53.

The square root of 689833853 is about 26264.6883286286. The cubic root of 689833853 is about 883.5846605923.

The spelling of 689833853 in words is "six hundred eighty-nine million, eight hundred thirty-three thousand, eight hundred fifty-three".