680239492 has 6 divisors (see below), whose sum is σ = 1190419118. Its totient is φ = 340119744.

The previous prime is 680239481. The next prime is 680239493. The reversal of 680239492 is 294932086.

It can be written as a sum of positive squares in only one way, i.e., 555827776 + 124411716 = 23576^2 + 11154^2 .

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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85029933 + ... + 85029940.

Almost surely, 2^680239492 is an apocalyptic number.

It is an amenable number.

680239492 is a deficient number, since it is larger than the sum of its proper divisors (510179626).

680239492 is a wasteful number, since it uses less digits than its factorization.

680239492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170059877 (or 170059875 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 680239492 is about 26081.4012660363. The cubic root of 680239492 is about 879.4691581508.

The spelling of 680239492 in words is "six hundred eighty million, two hundred thirty-nine thousand, four hundred ninety-two".