680069 has 4 divisors (see below), whose sum is σ = 732396. Its totient is φ = 627744.

The previous prime is 680059. The next prime is 680077. The reversal of 680069 is 960086.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 960086 = 2 ⋅480043.

It can be written as a sum of positive squares in 2 ways, for example, as 390625 + 289444 = 625^2 + 538^2 .

It is not a de Polignac number, because 680069 - 2¹² = 675973 is a prime.

It is a super-2 number, since 2×680069² = 924987689522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680039) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 26144 + ... + 26169.

It is an arithmetic number, because the mean of its divisors is an integer number (183099).

2⁶⁸⁰⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

680069 is a deficient number, since it is larger than the sum of its proper divisors (52327).

680069 is a wasteful number, since it uses less digits than its factorization.

680069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52326.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 680069 is about 824.6629614576. The cubic root of 680069 is about 87.9395676685.

The spelling of 680069 in words is "six hundred eighty thousand, sixty-nine".