685223801 has 16 divisors (see below), whose sum is σ = 705331200. Its totient is φ = 665512848.

The previous prime is 685223761. The next prime is 685223821. The reversal of 685223801 is 108322586.

It is a cyclic number.

It is not a de Polignac number, because 685223801 - 2¹⁰ = 685222777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685223821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1635170 + ... + 1635588.

It is an arithmetic number, because the mean of its divisors is an integer number (44083200).

Almost surely, 2^685223801 is an apocalyptic number.

It is an amenable number.

685223801 is a deficient number, since it is larger than the sum of its proper divisors (20107399).

685223801 is a wasteful number, since it uses less digits than its factorization.

685223801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 685223801 is about 26176.7798057744. The cubic root of 685223801 is about 881.6119735195.

The spelling of 685223801 in words is "six hundred eighty-five million, two hundred twenty-three thousand, eight hundred one".