685418411 has 2 divisors, whose sum is σ = 685418412. Its totient is φ = 685418410.

The previous prime is 685418381. The next prime is 685418417. The reversal of 685418411 is 114814586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 685418411 - 2⁶ = 685418347 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (685418417) 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, 342709205 + 342709206.

It is an arithmetic number, because the mean of its divisors is an integer number (342709206).

Almost surely, 2^685418411 is an apocalyptic number.

685418411 is a deficient number, since it is larger than the sum of its proper divisors (1).

685418411 is an equidigital number, since it uses as much as digits as its factorization.

685418411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 38.

The square root of 685418411 is about 26180.4967676322. The cubic root of 685418411 is about 881.6954276484.

The spelling of 685418411 in words is "six hundred eighty-five million, four hundred eighteen thousand, four hundred eleven".