680109369 has 4 divisors (see below), whose sum is σ = 906812496. Its totient is φ = 453406244.

The previous prime is 680109359. The next prime is 680109373. The reversal of 680109369 is 963901086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 680109369 - 2²⁰ = 679060793 is a prime.

It is a super-2 number, since 2×680109369² = 925097507603156322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 680109369.

It is not an unprimeable number, because it can be changed into a prime (680109359) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 113351559 + ... + 113351564.

It is an arithmetic number, because the mean of its divisors is an integer number (226703124).

Almost surely, 2^680109369 is an apocalyptic number.

It is an amenable number.

680109369 is a deficient number, since it is larger than the sum of its proper divisors (226703127).

680109369 is a wasteful number, since it uses less digits than its factorization.

680109369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226703126.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 680109369 is about 26078.9065913431. The cubic root of 680109369 is about 879.4130766950.

The spelling of 680109369 in words is "six hundred eighty million, one hundred nine thousand, three hundred sixty-nine".