680680853 has 4 divisors (see below), whose sum is σ = 680848908. Its totient is φ = 680512800.

The previous prime is 680680829. The next prime is 680680921. The reversal of 680680853 is 358086086.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 127396369 + 553284484 = 11287^2 + 23522^2 .

It is a cyclic number.

It is not a de Polignac number, because 680680853 - 2⁸ = 680680597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680670853) 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, 77798 + ... + 86103.

It is an arithmetic number, because the mean of its divisors is an integer number (170212227).

Almost surely, 2^680680853 is an apocalyptic number.

It is an amenable number.

680680853 is a deficient number, since it is larger than the sum of its proper divisors (168055).

680680853 is a wasteful number, since it uses less digits than its factorization.

680680853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168054.

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 680680853 is about 26089.8611150002. The cubic root of 680680853 is about 879.6593262073.

The spelling of 680680853 in words is "six hundred eighty million, six hundred eighty thousand, eight hundred fifty-three".