689764948 has 12 divisors (see below), whose sum is σ = 1207304980. Its totient is φ = 344820672.

The previous prime is 689764939. The next prime is 689764951. The reversal of 689764948 is 849467986.

689764948 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 162511504 + 527253444 = 12748^2 + 22962^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17440 + ... + 41032.

Almost surely, 2^689764948 is an apocalyptic number.

It is an amenable number.

689764948 is a deficient number, since it is larger than the sum of its proper divisors (517540032).

689764948 is a wasteful number, since it uses less digits than its factorization.

689764948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30906 (or 30904 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 61.

The square root of 689764948 is about 26263.3765536726. The cubic root of 689764948 is about 883.5552402578. Note that the first 3 decimals are identical.

The spelling of 689764948 in words is "six hundred eighty-nine million, seven hundred sixty-four thousand, nine hundred forty-eight".