685876223 has 2 divisors, whose sum is σ = 685876224. Its totient is φ = 685876222.

The previous prime is 685876207. The next prime is 685876229. The reversal of 685876223 is 322678586.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 685876223 - 2⁴ = 685876207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685876229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342938111 + 342938112.

It is an arithmetic number, because the mean of its divisors is an integer number (342938112).

Almost surely, 2^685876223 is an apocalyptic number.

685876223 is a deficient number, since it is larger than the sum of its proper divisors (1).

685876223 is an equidigital number, since it uses as much as digits as its factorization.

685876223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 47.

The square root of 685876223 is about 26189.2386869111. The cubic root of 685876223 is about 881.8916877740.

The spelling of 685876223 in words is "six hundred eighty-five million, eight hundred seventy-six thousand, two hundred twenty-three".