686149263 has 12 divisors (see below), whose sum is σ = 991472040. Its totient is φ = 457263216.

The previous prime is 686149259. The next prime is 686149267. The reversal of 686149263 is 362941686.

686149263 is a `hidden beast` number, since 6 + 8 + 614 + 9 + 26 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (686149259) and next prime (686149267).

It is not a de Polignac number, because 686149263 - 2² = 686149259 is a prime.

It is a super-2 number, since 2×686149263² = 941601622230886338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686149267) 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 11 ways as a sum of consecutive naturals, for example, 14545 + ... + 39797.

It is an arithmetic number, because the mean of its divisors is an integer number (82622670).

Almost surely, 2^686149263 is an apocalyptic number.

686149263 is a deficient number, since it is larger than the sum of its proper divisors (305322777).

686149263 is a wasteful number, since it uses less digits than its factorization.

686149263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28278 (or 28275 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 686149263 is about 26194.4509963465. The cubic root of 686149263 is about 882.0086961365.

It can be divided in two parts, 68614 and 9263, that added together give a palindrome (77877).

The spelling of 686149263 in words is "six hundred eighty-six million, one hundred forty-nine thousand, two hundred sixty-three".