685559133 has 48 divisors (see below), whose sum is σ = 1189924736. Its totient is φ = 386311680.

The previous prime is 685559131. The next prime is 685559239. The reversal of 685559133 is 331955586.

685559133 is a `hidden beast` number, since 6 + 8 + 55 + 591 + 3 + 3 = 666.

It is not a de Polignac number, because 685559133 - 2¹ = 685559131 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685559131) 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 in 47 ways as a sum of consecutive naturals, for example, 121413 + ... + 126933.

Almost surely, 2^685559133 is an apocalyptic number.

685559133 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

685559133 is a deficient number, since it is larger than the sum of its proper divisors (504365603).

685559133 is an equidigital number, since it uses as much as digits as its factorization.

685559133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5616 (or 5604 counting only the distinct ones).

The product of its digits is 486000, while the sum is 45.

The square root of 685559133 is about 26183.1841646504. The cubic root of 685559133 is about 881.7557632779.

The spelling of 685559133 in words is "six hundred eighty-five million, five hundred fifty-nine thousand, one hundred thirty-three".