681217922 has 16 divisors (see below), whose sum is σ = 1273966272. Its totient is φ = 265409520.

The previous prime is 681217921. The next prime is 681217939. The reversal of 681217922 is 229712186.

It is not an unprimeable number, because it can be changed into a prime (681217921) 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, 2211593 + ... + 2211900.

It is an arithmetic number, because the mean of its divisors is an integer number (79622892).

Almost surely, 2^681217922 is an apocalyptic number.

681217922 is a deficient number, since it is larger than the sum of its proper divisors (592748350).

681217922 is a wasteful number, since it uses less digits than its factorization.

681217922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4423513.

The product of its digits is 24192, while the sum is 38.

The square root of 681217922 is about 26100.1517620109. The cubic root of 681217922 is about 879.8906208750.

The spelling of 681217922 in words is "six hundred eighty-one million, two hundred seventeen thousand, nine hundred twenty-two".