686637053 has 4 divisors (see below), whose sum is σ = 701246400. Its totient is φ = 672027708.

The previous prime is 686637001. The next prime is 686637059. The reversal of 686637053 is 350736686.

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 686637053 - 2²⁴ = 669859837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 686636995 and 686637013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686637059) 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, 7304603 + ... + 7304696.

It is an arithmetic number, because the mean of its divisors is an integer number (175311600).

Almost surely, 2^686637053 is an apocalyptic number.

It is an amenable number.

686637053 is a deficient number, since it is larger than the sum of its proper divisors (14609347).

686637053 is a wasteful number, since it uses less digits than its factorization.

686637053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14609346.

The product of its (nonzero) digits is 544320, while the sum is 44.

The square root of 686637053 is about 26203.7602835929. The cubic root of 686637053 is about 882.2176560682.

The spelling of 686637053 in words is "six hundred eighty-six million, six hundred thirty-seven thousand, fifty-three".