685979503043 has 2 divisors, whose sum is σ = 685979503044. Its totient is φ = 685979503042.

The previous prime is 685979502961. The next prime is 685979503189. The reversal of 685979503043 is 340305979586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 685979503043 - 2⁸ = 685979502787 is a prime.

It is not a weakly prime, because it can be changed into another prime (685979503343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342989751521 + 342989751522.

It is an arithmetic number, because the mean of its divisors is an integer number (342989751522).

Almost surely, 2^685979503043 is an apocalyptic number.

685979503043 is a deficient number, since it is larger than the sum of its proper divisors (1).

685979503043 is an equidigital number, since it uses as much as digits as its factorization.

685979503043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24494400, while the sum is 59.

The spelling of 685979503043 in words is "six hundred eighty-five billion, nine hundred seventy-nine million, five hundred three thousand, forty-three".