685501351 has 2 divisors, whose sum is σ = 685501352. Its totient is φ = 685501350.

The previous prime is 685501343. The next prime is 685501373. The reversal of 685501351 is 153105586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 685501351 - 2³ = 685501343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685501381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342750675 + 342750676.

It is an arithmetic number, because the mean of its divisors is an integer number (342750676).

Almost surely, 2^685501351 is an apocalyptic number.

685501351 is a deficient number, since it is larger than the sum of its proper divisors (1).

685501351 is an equidigital number, since it uses as much as digits as its factorization.

685501351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 685501351 is about 26182.0807232733. The cubic root of 685501351 is about 881.7309898044.

The spelling of 685501351 in words is "six hundred eighty-five million, five hundred one thousand, three hundred fifty-one".