686673373 has 4 divisors (see below), whose sum is σ = 687986848. Its totient is φ = 685359900.

The previous prime is 686673331. The next prime is 686673389. The reversal of 686673373 is 373376686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 373376686 = 2 ⋅186688343.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-686673373 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 (686673473) 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 3 ways as a sum of consecutive naturals, for example, 655953 + ... + 656998.

It is an arithmetic number, because the mean of its divisors is an integer number (171996712).

Almost surely, 2^686673373 is an apocalyptic number.

It is an amenable number.

686673373 is a deficient number, since it is larger than the sum of its proper divisors (1313475).

686673373 is a wasteful number, since it uses less digits than its factorization.

686673373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313474.

The product of its digits is 2286144, while the sum is 49.

The square root of 686673373 is about 26204.4533047343. The cubic root of 686673373 is about 882.2332109043.

The spelling of 686673373 in words is "six hundred eighty-six million, six hundred seventy-three thousand, three hundred seventy-three".