689020930 has 32 divisors (see below), whose sum is σ = 1336935600. Its totient is φ = 254161152.

The previous prime is 689020873. The next prime is 689020957. The reversal of 689020930 is 39020986.

It can be written as a sum of positive squares in 8 ways, for example, as 12552849 + 676468081 = 3543^2 + 26009^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 689020930.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183916 + ... + 187624.

Almost surely, 2^689020930 is an apocalyptic number.

689020930 is a deficient number, since it is larger than the sum of its proper divisors (647914670).

689020930 is a wasteful number, since it uses less digits than its factorization.

689020930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5158.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 689020930 is about 26249.2081785337. The cubic root of 689020930 is about 883.2374423815.

The spelling of 689020930 in words is "six hundred eighty-nine million, twenty thousand, nine hundred thirty".