685254298247 has 2 divisors, whose sum is σ = 685254298248. Its totient is φ = 685254298246.

The previous prime is 685254298117. The next prime is 685254298283. The reversal of 685254298247 is 742892452586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 685254298247 - 2²⁸ = 684985862791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 685254298247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685254298847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342627149123 + 342627149124.

It is an arithmetic number, because the mean of its divisors is an integer number (342627149124).

Almost surely, 2^685254298247 is an apocalyptic number.

685254298247 is a deficient number, since it is larger than the sum of its proper divisors (1).

685254298247 is an equidigital number, since it uses as much as digits as its factorization.

685254298247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77414400, while the sum is 62.

The spelling of 685254298247 in words is "six hundred eighty-five billion, two hundred fifty-four million, two hundred ninety-eight thousand, two hundred forty-seven".