685922785 has 16 divisors (see below), whose sum is σ = 830321280. Its totient is φ = 543945600.

The previous prime is 685922779. The next prime is 685922789. The reversal of 685922785 is 587229586.

It is not a de Polignac number, because 685922785 - 2³ = 685922777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685922789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 610234 + ... + 611356.

It is an arithmetic number, because the mean of its divisors is an integer number (51895080).

Almost surely, 2^685922785 is an apocalyptic number.

It is an amenable number.

685922785 is a deficient number, since it is larger than the sum of its proper divisors (144398495).

685922785 is a wasteful number, since it uses less digits than its factorization.

685922785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088.

The product of its digits is 2419200, while the sum is 52.

The square root of 685922785 is about 26190.1276247368. The cubic root of 685922785 is about 881.9116436155.

The spelling of 685922785 in words is "six hundred eighty-five million, nine hundred twenty-two thousand, seven hundred eighty-five".