686744967 has 8 divisors (see below), whose sum is σ = 916272000. Its totient is φ = 457523960.

The previous prime is 686744963. The next prime is 686744977. The reversal of 686744967 is 769447686.

It is a happy number.

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 686744967 - 2² = 686744963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686744963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71217 + ... + 80282.

It is an arithmetic number, because the mean of its divisors is an integer number (114534000).

Almost surely, 2^686744967 is an apocalyptic number.

686744967 is a deficient number, since it is larger than the sum of its proper divisors (229527033).

686744967 is a wasteful number, since it uses less digits than its factorization.

686744967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153013.

The product of its digits is 12192768, while the sum is 57.

The square root of 686744967 is about 26205.8193346440. The cubic root of 686744967 is about 882.2638709978.

The spelling of 686744967 in words is "six hundred eighty-six million, seven hundred forty-four thousand, nine hundred sixty-seven".