689091794 has 8 divisors (see below), whose sum is σ = 1069280460. Its totient is φ = 332664976.

The previous prime is 689091709. The next prime is 689091803. The reversal of 689091794 is 497190986.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 641963569 + 47128225 = 25337^2 + 6865^2 .

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

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, 5940389 + ... + 5940504.

Almost surely, 2^689091794 is an apocalyptic number.

689091794 is a deficient number, since it is larger than the sum of its proper divisors (380188666).

689091794 is a wasteful number, since it uses less digits than its factorization.

689091794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11880924.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 689091794 is about 26250.5579750222. The cubic root of 689091794 is about 883.2677208969.

The spelling of 689091794 in words is "six hundred eighty-nine million, ninety-one thousand, seven hundred ninety-four".