680099 has 4 divisors (see below), whose sum is σ = 777264. Its totient is φ = 582936.

The previous prime is 680083. The next prime is 680107. The reversal of 680099 is 990086.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 990086 = 2 ⋅495043.

It is a cyclic number.

It is not a de Polignac number, because 680099 - 2⁴ = 680083 is a prime.

It is a Duffinian number.

680099 is a modest number, since divided by 99 gives 68 as remainder.

It is not an unprimeable number, because it can be changed into a prime (680039) 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, 48572 + ... + 48585.

It is an arithmetic number, because the mean of its divisors is an integer number (194316).

2⁶⁸⁰⁰⁹⁹ is an apocalyptic number.

680099 is a deficient number, since it is larger than the sum of its proper divisors (97165).

680099 is an equidigital number, since it uses as much as digits as its factorization.

680099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97164.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 680099 is about 824.6811505061. The cubic root of 680099 is about 87.9408607472.

The spelling of 680099 in words is "six hundred eighty thousand, ninety-nine".