680017129 has 4 divisors (see below), whose sum is σ = 741836880. Its totient is φ = 618197380.

The previous prime is 680017127. The next prime is 680017139. The reversal of 680017129 is 921710086.

It is a happy number.

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 680017129 - 2¹ = 680017127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 680017094 and 680017103.

It is not an unprimeable number, because it can be changed into a prime (680017123) 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, 30909859 + ... + 30909880.

It is an arithmetic number, because the mean of its divisors is an integer number (185459220).

Almost surely, 2^680017129 is an apocalyptic number.

It is an amenable number.

680017129 is a deficient number, since it is larger than the sum of its proper divisors (61819751).

680017129 is a wasteful number, since it uses less digits than its factorization.

680017129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61819750.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 680017129 is about 26077.1380523247. The cubic root of 680017129 is about 879.3733180261.

The spelling of 680017129 in words is "six hundred eighty million, seventeen thousand, one hundred twenty-nine".