686538053 has 4 divisors (see below), whose sum is σ = 686869728. Its totient is φ = 686206380.

The previous prime is 686538049. The next prime is 686538091. The reversal of 686538053 is 350835686.

686538053 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 686538053 - 2² = 686538049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 686537995 and 686538013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686532053) 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, 162713 + ... + 166878.

It is an arithmetic number, because the mean of its divisors is an integer number (171717432).

Almost surely, 2^686538053 is an apocalyptic number.

It is an amenable number.

686538053 is a deficient number, since it is larger than the sum of its proper divisors (331675).

686538053 is a wasteful number, since it uses less digits than its factorization.

686538053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331674.

The product of its (nonzero) digits is 518400, while the sum is 44.

The square root of 686538053 is about 26201.8711736395. The cubic root of 686538053 is about 882.1752543629.

The spelling of 686538053 in words is "six hundred eighty-six million, five hundred thirty-eight thousand, fifty-three".