685275611 has 2 divisors, whose sum is σ = 685275612. Its totient is φ = 685275610.

The previous prime is 685275571. The next prime is 685275629. The reversal of 685275611 is 116572586.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685275611 is a prime.

It is not a weakly prime, because it can be changed into another prime (685275691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342637805 + 342637806.

It is an arithmetic number, because the mean of its divisors is an integer number (342637806).

Almost surely, 2^685275611 is an apocalyptic number.

685275611 is a deficient number, since it is larger than the sum of its proper divisors (1).

685275611 is an equidigital number, since it uses as much as digits as its factorization.

685275611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 41.

The square root of 685275611 is about 26177.7694045921. The cubic root of 685275611 is about 881.6341926179.

The spelling of 685275611 in words is "six hundred eighty-five million, two hundred seventy-five thousand, six hundred eleven".