686969011 has 4 divisors (see below), whose sum is σ = 689504224. Its totient is φ = 684433800.

The previous prime is 686968999. The next prime is 686969027. The reversal of 686969011 is 110969686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110969686 = 2 ⋅55484843.

It is a cyclic number.

It is not a de Polignac number, because 686969011 - 2⁵ = 686968979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686969051) 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, 1267200 + ... + 1267741.

It is an arithmetic number, because the mean of its divisors is an integer number (172376056).

Almost surely, 2^686969011 is an apocalyptic number.

686969011 is a deficient number, since it is larger than the sum of its proper divisors (2535213).

686969011 is a wasteful number, since it uses less digits than its factorization.

686969011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535212.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 686969011 is about 26210.0936854487. The cubic root of 686969011 is about 882.3598039591.

The spelling of 686969011 in words is "six hundred eighty-six million, nine hundred sixty-nine thousand, eleven".