689833544 has 8 divisors (see below), whose sum is σ = 1293437910. Its totient is φ = 344916768.

The previous prime is 689833537. The next prime is 689833559. The reversal of 689833544 is 445338986.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 375196900 + 314636644 = 19370^2 + 17738^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 689833492 and 689833501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43114589 + ... + 43114604.

Almost surely, 2^689833544 is an apocalyptic number.

It is an amenable number.

689833544 is a deficient number, since it is larger than the sum of its proper divisors (603604366).

689833544 is a wasteful number, since it uses less digits than its factorization.

689833544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86229199 (or 86229195 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 50.

The square root of 689833544 is about 26264.6824462052. The cubic root of 689833544 is about 883.5845286631.

It can be divided in two parts, 68983 and 3544, that added together give a palindrome (72527).

The spelling of 689833544 in words is "six hundred eighty-nine million, eight hundred thirty-three thousand, five hundred forty-four".