685324177 has 2 divisors, whose sum is σ = 685324178. Its totient is φ = 685324176.

The previous prime is 685324147. The next prime is 685324181. The reversal of 685324177 is 771423586.

685324177 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 597264721 + 88059456 = 24439^2 + 9384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685324177 is a prime.

It is not a weakly prime, because it can be changed into another prime (685324147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342662088 + 342662089.

It is an arithmetic number, because the mean of its divisors is an integer number (342662089).

Almost surely, 2^685324177 is an apocalyptic number.

It is an amenable number.

685324177 is a deficient number, since it is larger than the sum of its proper divisors (1).

685324177 is an equidigital number, since it uses as much as digits as its factorization.

685324177 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 43.

The square root of 685324177 is about 26178.6970072997. The cubic root of 685324177 is about 881.6550194863.

The spelling of 685324177 in words is "six hundred eighty-five million, three hundred twenty-four thousand, one hundred seventy-seven".