680195 has 8 divisors (see below), whose sum is σ = 844560. Its totient is φ = 525280.

The previous prime is 680189. The next prime is 680203. The reversal of 680195 is 591086.

680195 = T₇₉ + T₈₀ + ... + T₁₆₅.

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

It is not a de Polignac number, because 680195 - 2¹⁰ = 679171 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2201 + ... + 2490.

It is an arithmetic number, because the mean of its divisors is an integer number (105570).

2⁶⁸⁰¹⁹⁵ is an apocalyptic number.

680195 is a deficient number, since it is larger than the sum of its proper divisors (164365).

680195 is a wasteful number, since it uses less digits than its factorization.

680195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4725.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 680195 is about 824.7393527655. The cubic root of 680195 is about 87.9449983436.

The spelling of 680195 in words is "six hundred eighty thousand, one hundred ninety-five".