685842773 has 16 divisors (see below), whose sum is σ = 892256256. Its totient is φ = 511185840.

The previous prime is 685842749. The next prime is 685842797. The reversal of 685842773 is 377248586.

It is an interprime number because it is at equal distance from previous prime (685842749) and next prime (685842797).

It is not a de Polignac number, because 685842773 - 2⁶ = 685842709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685842743) 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, 191861 + ... + 195402.

It is an arithmetic number, because the mean of its divisors is an integer number (55766016).

Almost surely, 2^685842773 is an apocalyptic number.

It is an amenable number.

685842773 is a deficient number, since it is larger than the sum of its proper divisors (206413483).

685842773 is a wasteful number, since it uses less digits than its factorization.

685842773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387304.

The product of its digits is 2257920, while the sum is 50.

The square root of 685842773 is about 26188.6000580405. The cubic root of 685842773 is about 881.8773510003.

The spelling of 685842773 in words is "six hundred eighty-five million, eight hundred forty-two thousand, seven hundred seventy-three".