685022605 has 8 divisors (see below), whose sum is σ = 828028152. Its totient is φ = 544017408.

The previous prime is 685022579. The next prime is 685022609. The reversal of 685022605 is 506220586.

685022605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 75377124 + 609645481 = 8682^2 + 24691^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 685022605 - 2¹³ = 685014413 is a prime.

It is a Duffinian number.

685022605 is a modest number, since divided by 22605 gives 685 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685022609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499332 + ... + 500701.

It is an arithmetic number, because the mean of its divisors is an integer number (103503519).

Almost surely, 2^685022605 is an apocalyptic number.

It is an amenable number.

685022605 is a deficient number, since it is larger than the sum of its proper divisors (143005547).

685022605 is a wasteful number, since it uses less digits than its factorization.

685022605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000175.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 685022605 is about 26172.9364993690. The cubic root of 685022605 is about 881.5256785184.

The spelling of 685022605 in words is "six hundred eighty-five million, twenty-two thousand, six hundred five".