685921922 has 8 divisors (see below), whose sum is σ = 1175866176. Its totient is φ = 293966532.

The previous prime is 685921913. The next prime is 685921927. The reversal of 685921922 is 229129586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (685921927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24497198 + ... + 24497225.

It is an arithmetic number, because the mean of its divisors is an integer number (146983272).

Almost surely, 2^685921922 is an apocalyptic number.

685921922 is a deficient number, since it is larger than the sum of its proper divisors (489944254).

685921922 is a wasteful number, since it uses less digits than its factorization.

685921922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48994432.

The product of its digits is 155520, while the sum is 44.

The square root of 685921922 is about 26190.1111490578. Note that the first 4 decimals coincide. The cubic root of 685921922 is about 881.9112737536.

The spelling of 685921922 in words is "six hundred eighty-five million, nine hundred twenty-one thousand, nine hundred twenty-two".