689994806 has 8 divisors (see below), whose sum is σ = 1040710944. Its totient is φ = 343091160.

The previous prime is 689994797. The next prime is 689994817. The reversal of 689994806 is 608499986.

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 952670 + ... + 953393.

It is an arithmetic number, because the mean of its divisors is an integer number (130088868).

Almost surely, 2^689994806 is an apocalyptic number.

689994806 is a deficient number, since it is larger than the sum of its proper divisors (350716138).

689994806 is a wasteful number, since it uses less digits than its factorization.

689994806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906246.

The product of its (nonzero) digits is 6718464, while the sum is 59.

The square root of 689994806 is about 26267.7522068410. The cubic root of 689994806 is about 883.6533749850.

The spelling of 689994806 in words is "six hundred eighty-nine million, nine hundred ninety-four thousand, eight hundred six".