680517109 has 4 divisors (see below), whose sum is σ = 680611360. Its totient is φ = 680422860.

The previous prime is 680517107. The next prime is 680517119. The reversal of 680517109 is 901715086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 680517109 - 2¹ = 680517107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680517107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35307 + ... + 51064.

It is an arithmetic number, because the mean of its divisors is an integer number (170152840).

Almost surely, 2^680517109 is an apocalyptic number.

It is an amenable number.

680517109 is a deficient number, since it is larger than the sum of its proper divisors (94251).

680517109 is an equidigital number, since it uses as much as digits as its factorization.

680517109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94250.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 680517109 is about 26086.7228489897. The cubic root of 680517109 is about 879.5887838537.

The spelling of 680517109 in words is "six hundred eighty million, five hundred seventeen thousand, one hundred nine".