685187217283 has 2 divisors, whose sum is σ = 685187217284. Its totient is φ = 685187217282.

The previous prime is 685187217251. The next prime is 685187217287. The reversal of 685187217283 is 382712781586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 685187217283 - 2⁵ = 685187217251 is a prime.

It is not a weakly prime, because it can be changed into another prime (685187217287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342593608641 + 342593608642.

It is an arithmetic number, because the mean of its divisors is an integer number (342593608642).

Almost surely, 2^685187217283 is an apocalyptic number.

685187217283 is a deficient number, since it is larger than the sum of its proper divisors (1).

685187217283 is an equidigital number, since it uses as much as digits as its factorization.

685187217283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9031680, while the sum is 58.

The spelling of 685187217283 in words is "six hundred eighty-five billion, one hundred eighty-seven million, two hundred seventeen thousand, two hundred eighty-three".