680343005 has 4 divisors (see below), whose sum is σ = 816411612. Its totient is φ = 544274400.

The previous prime is 680342989. The next prime is 680343031. The reversal of 680343005 is 500343086.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500343086 = 2 ⋅250171543.

It can be written as a sum of positive squares in 2 ways, for example, as 442597444 + 237745561 = 21038^2 + 15419^2 .

It is not a de Polignac number, because 680343005 - 2⁴ = 680342989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68034296 + ... + 68034305.

It is an arithmetic number, because the mean of its divisors is an integer number (204102903).

Almost surely, 2^680343005 is an apocalyptic number.

It is an amenable number.

680343005 is a deficient number, since it is larger than the sum of its proper divisors (136068607).

680343005 is a wasteful number, since it uses less digits than its factorization.

680343005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136068606.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 680343005 is about 26083.3856123012. The cubic root of 680343005 is about 879.5137659077.

The spelling of 680343005 in words is "six hundred eighty million, three hundred forty-three thousand, five".