680870689 has 8 divisors (see below), whose sum is σ = 721852128. Its totient is φ = 639992640.

The previous prime is 680870677. The next prime is 680870699. The reversal of 680870689 is 986078086.

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

It is a cyclic number.

It is not a de Polignac number, because 680870689 - 2⁵ = 680870657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680870699) 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 7 ways as a sum of consecutive naturals, for example, 12067 + ... + 38824.

It is an arithmetic number, because the mean of its divisors is an integer number (90231516).

Almost surely, 2^680870689 is an apocalyptic number.

It is an amenable number.

680870689 is a deficient number, since it is larger than the sum of its proper divisors (40981439).

680870689 is a wasteful number, since it uses less digits than its factorization.

680870689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51695.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The square root of 680870689 is about 26093.4989796309. The cubic root of 680870689 is about 879.7410950643.

The spelling of 680870689 in words is "six hundred eighty million, eight hundred seventy thousand, six hundred eighty-nine".