686870011 has 4 divisors (see below), whose sum is σ = 687151800. Its totient is φ = 686588224.

The previous prime is 686869979. The next prime is 686870053. The reversal of 686870011 is 110078686.

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

It is a cyclic number.

It is not a de Polignac number, because 686870011 - 2⁵ = 686869979 is a prime.

It is a super-2 number, since 2×686870011² = 943580824022280242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686870071) 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, 137206 + ... + 142123.

It is an arithmetic number, because the mean of its divisors is an integer number (171787950).

Almost surely, 2^686870011 is an apocalyptic number.

686870011 is a deficient number, since it is larger than the sum of its proper divisors (281789).

686870011 is a wasteful number, since it uses less digits than its factorization.

686870011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281788.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 686870011 is about 26208.2050320124. The cubic root of 686870011 is about 882.3174159155.

The spelling of 686870011 in words is "six hundred eighty-six million, eight hundred seventy thousand, eleven".