680894717 has 4 divisors (see below), whose sum is σ = 681091836. Its totient is φ = 680697600.

The previous prime is 680894629. The next prime is 680894729. The reversal of 680894717 is 717498086.

680894717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 673610116 + 7284601 = 25954^2 + 2699^2 .

It is a cyclic number.

It is not a de Polignac number, because 680894717 - 2²⁶ = 613785853 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 (680894777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93284 + ... + 100317.

It is an arithmetic number, because the mean of its divisors is an integer number (170272959).

Almost surely, 2^680894717 is an apocalyptic number.

It is an amenable number.

680894717 is a deficient number, since it is larger than the sum of its proper divisors (197119).

680894717 is a wasteful number, since it uses less digits than its factorization.

680894717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197118.

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 680894717 is about 26093.9593967646. The cubic root of 680894717 is about 879.7514436620.

The spelling of 680894717 in words is "six hundred eighty million, eight hundred ninety-four thousand, seven hundred seventeen".