680208135 has 16 divisors (see below), whose sum is σ = 1099555296. Its totient is φ = 359036928.

The previous prime is 680208127. The next prime is 680208143. The reversal of 680208135 is 531802086.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (680208127) and next prime (680208143).

It is not a de Polignac number, because 680208135 - 2³ = 680208127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 680208096 and 680208105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232294 + ... + 235203.

It is an arithmetic number, because the mean of its divisors is an integer number (68722206).

Almost surely, 2^680208135 is an apocalyptic number.

680208135 is a deficient number, since it is larger than the sum of its proper divisors (419347161).

680208135 is a wasteful number, since it uses less digits than its factorization.

680208135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467602.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 680208135 is about 26080.8001219288. The cubic root of 680208135 is about 879.4556443131.

The spelling of 680208135 in words is "six hundred eighty million, two hundred eight thousand, one hundred thirty-five".