685084081 has 8 divisors (see below), whose sum is σ = 773136000. Its totient is φ = 601327440.

The previous prime is 685084073. The next prime is 685084093. The reversal of 685084081 is 180480586.

685084081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 685084081 - 2³ = 685084073 is a prime.

It is a super-2 number, since 2×685084081² = 938680396079229122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685084021) 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, 1073481 + ... + 1074118.

It is an arithmetic number, because the mean of its divisors is an integer number (96642000).

Almost surely, 2^685084081 is an apocalyptic number.

It is an amenable number.

685084081 is a deficient number, since it is larger than the sum of its proper divisors (88051919).

685084081 is a wasteful number, since it uses less digits than its factorization.

685084081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147639.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 685084081 is about 26174.1108922538. The cubic root of 685084081 is about 881.5520479896.

The spelling of 685084081 in words is "six hundred eighty-five million, eighty-four thousand, eighty-one".