685073 has 2 divisors, whose sum is σ = 685074. Its totient is φ = 685072.

The previous prime is 685063. The next prime is 685081. The reversal of 685073 is 370586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 677329 + 7744 = 823^2 + 88^2 .

It is a cyclic number.

It is not a de Polignac number, because 685073 - 2⁴ = 685057 is a prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (685063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342536 + 342537.

It is an arithmetic number, because the mean of its divisors is an integer number (342537).

2⁶⁸⁵⁰⁷³ is an apocalyptic number.

It is an amenable number.

685073 is a deficient number, since it is larger than the sum of its proper divisors (1).

685073 is an equidigital number, since it uses as much as digits as its factorization.

685073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 685073 is about 827.6913676003. The cubic root of 685073 is about 88.1547295030.

The spelling of 685073 in words is "six hundred eighty-five thousand, seventy-three".