686520411 has 4 divisors (see below), whose sum is σ = 915360552. Its totient is φ = 457680272.

The previous prime is 686520409. The next prime is 686520427. The reversal of 686520411 is 114025686.

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 686520411 - 2¹ = 686520409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (686520431) 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 3 ways as a sum of consecutive naturals, for example, 114420066 + ... + 114420071.

It is an arithmetic number, because the mean of its divisors is an integer number (228840138).

Almost surely, 2^686520411 is an apocalyptic number.

686520411 is a deficient number, since it is larger than the sum of its proper divisors (228840141).

686520411 is a wasteful number, since it uses less digits than its factorization.

686520411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228840140.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 686520411 is about 26201.5345161309. The cubic root of 686520411 is about 882.1676978655.

The spelling of 686520411 in words is "six hundred eighty-six million, five hundred twenty thousand, four hundred eleven".