686916922 has 8 divisors (see below), whose sum is σ = 1030776372. Its totient is φ = 343324800.

The previous prime is 686916889. The next prime is 686916949. The reversal of 686916922 is 229619686.

It can be written as a sum of positive squares in 2 ways, for example, as 670343881 + 16573041 = 25891^2 + 4071^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60279 + ... + 70762.

Almost surely, 2^686916922 is an apocalyptic number.

686916922 is a deficient number, since it is larger than the sum of its proper divisors (343859450).

686916922 is a wasteful number, since it uses less digits than its factorization.

686916922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133664.

The product of its digits is 559872, while the sum is 49.

The square root of 686916922 is about 26209.0999845474. The cubic root of 686916922 is about 882.3375019334.

The spelling of 686916922 in words is "six hundred eighty-six million, nine hundred sixteen thousand, nine hundred twenty-two".