680239403 has 4 divisors (see below), whose sum is σ = 696058968. Its totient is φ = 664419840.

The previous prime is 680239397. The next prime is 680239481. The reversal of 680239403 is 304932086.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680239403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680239493) 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, 7909718 + ... + 7909803.

It is an arithmetic number, because the mean of its divisors is an integer number (174014742).

Almost surely, 2^680239403 is an apocalyptic number.

680239403 is a deficient number, since it is larger than the sum of its proper divisors (15819565).

680239403 is a wasteful number, since it uses less digits than its factorization.

680239403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15819564.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 680239403 is about 26081.3995598396. The cubic root of 680239403 is about 879.4691197953.

The spelling of 680239403 in words is "six hundred eighty million, two hundred thirty-nine thousand, four hundred three".