686119249 has 4 divisors (see below), whose sum is σ = 708252160. Its totient is φ = 663986340.

The previous prime is 686119219. The next prime is 686119271. The reversal of 686119249 is 942911686.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 686119249 - 2¹⁹ = 685594961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 686119199 and 686119208.

It is not an unprimeable number, because it can be changed into a prime (686119219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11066409 + ... + 11066470.

It is an arithmetic number, because the mean of its divisors is an integer number (177063040).

Almost surely, 2^686119249 is an apocalyptic number.

It is an amenable number.

686119249 is a deficient number, since it is larger than the sum of its proper divisors (22132911).

686119249 is a wasteful number, since it uses less digits than its factorization.

686119249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22132910.

The product of its digits is 186624, while the sum is 46.

The square root of 686119249 is about 26193.8780824833. The cubic root of 686119249 is about 881.9958354775.

The spelling of 686119249 in words is "six hundred eighty-six million, one hundred nineteen thousand, two hundred forty-nine".