686986533 has 24 divisors (see below), whose sum is σ = 1017533088. Its totient is φ = 446396832.

The previous prime is 686986513. The next prime is 686986543. The reversal of 686986533 is 335689686.

It is not a de Polignac number, because 686986533 - 2⁸ = 686986277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 686986533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686986513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213966 + ... + 217152.

It is an arithmetic number, because the mean of its divisors is an integer number (42397212).

Almost surely, 2^686986533 is an apocalyptic number.

It is an amenable number.

686986533 is a deficient number, since it is larger than the sum of its proper divisors (330546555).

686986533 is a wasteful number, since it uses less digits than its factorization.

686986533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3793 (or 3790 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The square root of 686986533 is about 26210.4279438547. The cubic root of 686986533 is about 882.3673057905.

The spelling of 686986533 in words is "six hundred eighty-six million, nine hundred eighty-six thousand, five hundred thirty-three".