689686750 has 32 divisors (see below), whose sum is σ = 1292679648. Its totient is φ = 275536000.

The previous prime is 689686703. The next prime is 689686769. The reversal of 689686750 is 57686986.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 689686691 and 689686700.

It is a congruent number.

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, 339237 + ... + 341263.

It is an arithmetic number, because the mean of its divisors is an integer number (40396239).

Almost surely, 2^689686750 is an apocalyptic number.

689686750 is a deficient number, since it is larger than the sum of its proper divisors (602992898).

689686750 is a wasteful number, since it uses less digits than its factorization.

689686750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3405 (or 3395 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 55.

The square root of 689686750 is about 26261.8877843920. The cubic root of 689686750 is about 883.5218497218.

The spelling of 689686750 in words is "six hundred eighty-nine million, six hundred eighty-six thousand, seven hundred fifty".