680794809 has 8 divisors (see below), whose sum is σ = 908506272. Its totient is φ = 453473280.

The previous prime is 680794771. The next prime is 680794867. The reversal of 680794809 is 908497086.

It is a happy number.

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

It is not a de Polignac number, because 680794809 - 2²⁴ = 664017593 is a prime.

It is a super-3 number, since 3×680794809³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (680794879) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 93384 + ... + 100409.

It is an arithmetic number, because the mean of its divisors is an integer number (113563284).

Almost surely, 2^680794809 is an apocalyptic number.

It is an amenable number.

680794809 is a deficient number, since it is larger than the sum of its proper divisors (227711463).

680794809 is a wasteful number, since it uses less digits than its factorization.

680794809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194967.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 680794809 is about 26092.0449371068. The cubic root of 680794809 is about 879.7084127771.

The spelling of 680794809 in words is "six hundred eighty million, seven hundred ninety-four thousand, eight hundred nine".