680354309 has 4 divisors (see below), whose sum is σ = 680453004. Its totient is φ = 680255616.

The previous prime is 680354293. The next prime is 680354317. The reversal of 680354309 is 903453086.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99062209 + 581292100 = 9953^2 + 24110^2 .

It is a cyclic number.

It is not a de Polignac number, because 680354309 - 2⁴ = 680354293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680354009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38162 + ... + 53075.

It is an arithmetic number, because the mean of its divisors is an integer number (170113251).

Almost surely, 2^680354309 is an apocalyptic number.

It is an amenable number.

680354309 is a deficient number, since it is larger than the sum of its proper divisors (98695).

680354309 is an equidigital number, since it uses as much as digits as its factorization.

680354309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98694.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 680354309 is about 26083.6023010626. The cubic root of 680354309 is about 879.5186369646.

The spelling of 680354309 in words is "six hundred eighty million, three hundred fifty-four thousand, three hundred nine".