685342093 has 2 divisors, whose sum is σ = 685342094. Its totient is φ = 685342092.

The previous prime is 685342067. The next prime is 685342153. The reversal of 685342093 is 390243586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 667550569 + 17791524 = 25837^2 + 4218^2 .

It is a cyclic number.

It is not a de Polignac number, because 685342093 - 2²⁹ = 148471181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685343093) 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, 342671046 + 342671047.

It is an arithmetic number, because the mean of its divisors is an integer number (342671047).

Almost surely, 2^685342093 is an apocalyptic number.

It is an amenable number.

685342093 is a deficient number, since it is larger than the sum of its proper divisors (1).

685342093 is an equidigital number, since it uses as much as digits as its factorization.

685342093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 685342093 is about 26179.0391916892. The cubic root of 685342093 is about 881.6627022707.

The spelling of 685342093 in words is "six hundred eighty-five million, three hundred forty-two thousand, ninety-three".