685020533 has 2 divisors, whose sum is σ = 685020534. Its totient is φ = 685020532.

The previous prime is 685020517. The next prime is 685020599. The reversal of 685020533 is 335020586.

685020533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 375506884 + 309513649 = 19378^2 + 17593^2 .

It is a cyclic number.

It is not a de Polignac number, because 685020533 - 2⁴ = 685020517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 685020533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685026533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342510266 + 342510267.

It is an arithmetic number, because the mean of its divisors is an integer number (342510267).

Almost surely, 2^685020533 is an apocalyptic number.

It is an amenable number.

685020533 is a deficient number, since it is larger than the sum of its proper divisors (1).

685020533 is an equidigital number, since it uses as much as digits as its factorization.

685020533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 685020533 is about 26172.8969164669. The cubic root of 685020533 is about 881.5247897288.

The spelling of 685020533 in words is "six hundred eighty-five million, twenty thousand, five hundred thirty-three".