689362816 has 16 divisors (see below), whose sum is σ = 1373340240. Its totient is φ = 344681344.

The previous prime is 689362787. The next prime is 689362837. The reversal of 689362816 is 618263986.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 689362816.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2692696 + ... + 2692951.

It is an arithmetic number, because the mean of its divisors is an integer number (85833765).

Almost surely, 2^689362816 is an apocalyptic number.

It is an amenable number.

689362816 is a deficient number, since it is larger than the sum of its proper divisors (683977424).

689362816 is an equidigital number, since it uses as much as digits as its factorization.

689362816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5385661 (or 5385649 counting only the distinct ones).

The product of its digits is 746496, while the sum is 49.

The square root of 689362816 is about 26255.7196816237. The cubic root of 689362816 is about 883.3835030561.

The spelling of 689362816 in words is "six hundred eighty-nine million, three hundred sixty-two thousand, eight hundred sixteen".