685338787 has 8 divisors (see below), whose sum is σ = 783511136. Its totient is φ = 587233152.

The previous prime is 685338767. The next prime is 685338791. The reversal of 685338787 is 787833586.

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 685338787 - 2¹¹ = 685336739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685338737) 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, 7723 + ... + 37819.

It is an arithmetic number, because the mean of its divisors is an integer number (97938892).

Almost surely, 2^685338787 is an apocalyptic number.

685338787 is a deficient number, since it is larger than the sum of its proper divisors (98172349).

685338787 is a wasteful number, since it uses less digits than its factorization.

685338787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33357.

The product of its digits is 6773760, while the sum is 55.

The square root of 685338787 is about 26178.9760494944. The cubic root of 685338787 is about 881.6612845935.

The spelling of 685338787 in words is "six hundred eighty-five million, three hundred thirty-eight thousand, seven hundred eighty-seven".