685515089 has 8 divisors (see below), whose sum is σ = 829531008. Its totient is φ = 553020480.

The previous prime is 685515037. The next prime is 685515097. The reversal of 685515089 is 980515586.

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 685515089 - 2¹² = 685510993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385515089) 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, 2880197 + ... + 2880434.

It is an arithmetic number, because the mean of its divisors is an integer number (103691376).

Almost surely, 2^685515089 is an apocalyptic number.

It is an amenable number.

685515089 is a deficient number, since it is larger than the sum of its proper divisors (144015919).

685515089 is a wasteful number, since it uses less digits than its factorization.

685515089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5760655.

The product of its (nonzero) digits is 432000, while the sum is 47.

The square root of 685515089 is about 26182.3430769670. The cubic root of 685515089 is about 881.7368799651.

The spelling of 685515089 in words is "six hundred eighty-five million, five hundred fifteen thousand, eighty-nine".