686991333 has 16 divisors (see below), whose sum is σ = 1064007296. Its totient is φ = 386130240.

The previous prime is 686991323. The next prime is 686991359. The reversal of 686991333 is 333199686.

It is a happy number.

It is not a de Polignac number, because 686991333 - 2⁴ = 686991317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686991323) 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 15 ways as a sum of consecutive naturals, for example, 266866 + ... + 269427.

It is an arithmetic number, because the mean of its divisors is an integer number (66500456).

Almost surely, 2^686991333 is an apocalyptic number.

It is an amenable number.

686991333 is a deficient number, since it is larger than the sum of its proper divisors (377015963).

686991333 is a wasteful number, since it uses less digits than its factorization.

686991333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536364.

The product of its digits is 629856, while the sum is 48.

The square root of 686991333 is about 26210.5195103035. The cubic root of 686991333 is about 882.3693608299.

The spelling of 686991333 in words is "six hundred eighty-six million, nine hundred ninety-one thousand, three hundred thirty-three".