685335959 has 16 divisors (see below), whose sum is σ = 856016640. Its totient is φ = 533045760.

The previous prime is 685335953. The next prime is 685335961. The reversal of 685335959 is 959533586.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685335959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 685335959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685335953) 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, 35447 + ... + 51255.

It is an arithmetic number, because the mean of its divisors is an integer number (53501040).

Almost surely, 2^685335959 is an apocalyptic number.

685335959 is a deficient number, since it is larger than the sum of its proper divisors (170680681).

685335959 is a wasteful number, since it uses less digits than its factorization.

685335959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16390.

The product of its digits is 4374000, while the sum is 53.

The square root of 685335959 is about 26178.9220366309. The cubic root of 685335959 is about 881.6600718883.

The spelling of 685335959 in words is "six hundred eighty-five million, three hundred thirty-five thousand, nine hundred fifty-nine".