680609402 has 16 divisors (see below), whose sum is σ = 1149652224. Its totient is φ = 299388000.

The previous prime is 680609401. The next prime is 680609417. The reversal of 680609402 is 204906086.

It is not an unprimeable number, because it can be changed into a prime (680609401) 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 7 ways as a sum of consecutive naturals, for example, 498299 + ... + 499662.

It is an arithmetic number, because the mean of its divisors is an integer number (71853264).

Almost surely, 2^680609402 is an apocalyptic number.

680609402 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

680609402 is a deficient number, since it is larger than the sum of its proper divisors (469042822).

680609402 is a wasteful number, since it uses less digits than its factorization.

680609402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998005.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 680609402 is about 26088.4917540283. The cubic root of 680609402 is about 879.6285458802.

The spelling of 680609402 in words is "six hundred eighty million, six hundred nine thousand, four hundred two".