686353449 has 8 divisors (see below), whose sum is σ = 915378912. Its totient is φ = 457448480.

The previous prime is 686353433. The next prime is 686353457. The reversal of 686353449 is 944353686.

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

It is a cyclic number.

It is not a de Polignac number, because 686353449 - 2⁴ = 686353433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 686353398 and 686353407.

It is not an unprimeable number, because it can be changed into a prime (686353949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15867 + ... + 40304.

It is an arithmetic number, because the mean of its divisors is an integer number (114422364).

Almost surely, 2^686353449 is an apocalyptic number.

It is an amenable number.

686353449 is a deficient number, since it is larger than the sum of its proper divisors (229025463).

686353449 is a wasteful number, since it uses less digits than its factorization.

686353449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60247.

The product of its digits is 1866240, while the sum is 48.

The square root of 686353449 is about 26198.3482112900. The cubic root of 686353449 is about 882.0961775715.

The spelling of 686353449 in words is "six hundred eighty-six million, three hundred fifty-three thousand, four hundred forty-nine".