686880733 has 32 divisors (see below), whose sum is σ = 936050688. Its totient is φ = 487468800.

The previous prime is 686880721. The next prime is 686880737. The reversal of 686880733 is 337088686.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-686880733 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 (686880737) 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 in 31 ways as a sum of consecutive naturals, for example, 32116 + ... + 49042.

It is an arithmetic number, because the mean of its divisors is an integer number (29251584).

Almost surely, 2^686880733 is an apocalyptic number.

It is an amenable number.

686880733 is a deficient number, since it is larger than the sum of its proper divisors (249169955).

686880733 is a wasteful number, since it uses less digits than its factorization.

686880733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16993.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 686880733 is about 26208.4095854747. The cubic root of 686880733 is about 882.3220068657.

The spelling of 686880733 in words is "six hundred eighty-six million, eight hundred eighty thousand, seven hundred thirty-three".