685097 has 4 divisors (see below), whose sum is σ = 782976. Its totient is φ = 587220.

The previous prime is 685093. The next prime is 685099. The reversal of 685097 is 790586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 790586 = 2 ⋅395293.

It is a cyclic number.

It is not a de Polignac number, because 685097 - 2² = 685093 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48929 + ... + 48942.

It is an arithmetic number, because the mean of its divisors is an integer number (195744).

2⁶⁸⁵⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

685097 is a deficient number, since it is larger than the sum of its proper divisors (97879).

685097 is an equidigital number, since it uses as much as digits as its factorization.

685097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97878.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 685097 is about 827.7058656310. The cubic root of 685097 is about 88.1557589256.

The spelling of 685097 in words is "six hundred eighty-five thousand, ninety-seven".