686268007 has 4 divisors (see below), whose sum is σ = 686412880. Its totient is φ = 686123136.

The previous prime is 686267969. The next prime is 686268029. The reversal of 686268007 is 700862686.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-686268007 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 (686268907) 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, 65082 + ... + 74887.

It is an arithmetic number, because the mean of its divisors is an integer number (171603220).

Almost surely, 2^686268007 is an apocalyptic number.

686268007 is a deficient number, since it is larger than the sum of its proper divisors (144873).

686268007 is a wasteful number, since it uses less digits than its factorization.

686268007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144872.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 686268007 is about 26196.7174852118. The cubic root of 686268007 is about 882.0595729186.

The spelling of 686268007 in words is "six hundred eighty-six million, two hundred sixty-eight thousand, seven".