689470850 has 12 divisors (see below), whose sum is σ = 1282415874. Its totient is φ = 275788320.

The previous prime is 689470849. The next prime is 689470867. The reversal of 689470850 is 58074986.

It can be written as a sum of positive squares in 3 ways, for example, as 346369321 + 343101529 = 18611^2 + 18523^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 689470795 and 689470804.

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 in 5 ways as a sum of consecutive naturals, for example, 6894659 + ... + 6894758.

Almost surely, 2^689470850 is an apocalyptic number.

689470850 is a deficient number, since it is larger than the sum of its proper divisors (592945024).

689470850 is a wasteful number, since it uses less digits than its factorization.

689470850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13789429 (or 13789424 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 689470850 is about 26257.7769432220. The cubic root of 689470850 is about 883.4296473439.

The spelling of 689470850 in words is "six hundred eighty-nine million, four hundred seventy thousand, eight hundred fifty".