685106689 has 8 divisors (see below), whose sum is σ = 704325440. Its totient is φ = 665924976.

The previous prime is 685106687. The next prime is 685106713. The reversal of 685106689 is 986601586.

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 685106689 - 2¹ = 685106687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685106687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30622 + ... + 48040.

It is an arithmetic number, because the mean of its divisors is an integer number (88040680).

Almost surely, 2^685106689 is an apocalyptic number.

It is an amenable number.

685106689 is a deficient number, since it is larger than the sum of its proper divisors (19218751).

685106689 is a wasteful number, since it uses less digits than its factorization.

685106689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18519.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 685106689 is about 26174.5427658250. The cubic root of 685106689 is about 881.5617450521.

The spelling of 685106689 in words is "six hundred eighty-five million, one hundred six thousand, six hundred eighty-nine".