680617 has 4 divisors (see below), whose sum is σ = 777856. Its totient is φ = 583380.

The previous prime is 680611. The next prime is 680623. The reversal of 680617 is 716086.

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 an interprime number because it is at equal distance from previous prime (680611) and next prime (680623).

It is not a de Polignac number, because 680617 - 2⁷ = 680489 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (680611) 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, 48609 + ... + 48622.

It is an arithmetic number, because the mean of its divisors is an integer number (194464).

2⁶⁸⁰⁶¹⁷ is an apocalyptic number.

It is an amenable number.

680617 is a deficient number, since it is larger than the sum of its proper divisors (97239).

680617 is an equidigital number, since it uses as much as digits as its factorization.

680617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97238.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 680617 is about 824.9951515009. The cubic root of 680617 is about 87.9631819120.

The spelling of 680617 in words is "six hundred eighty thousand, six hundred seventeen".