249687 has 6 divisors (see below), whose sum is σ = 360672. Its totient is φ = 166452.

The previous prime is 249677. The next prime is 249703. The reversal of 249687 is 786942.

It is not a de Polignac number, because 249687 - 2⁴ = 249671 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 249687.

It is not an unprimeable number, because it can be changed into a prime (249607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13863 + ... + 13880.

It is an arithmetic number, because the mean of its divisors is an integer number (60112).

2²⁴⁹⁶⁸⁷ is an apocalyptic number.

249687 is a deficient number, since it is larger than the sum of its proper divisors (110985).

249687 is a wasteful number, since it uses less digits than its factorization.

249687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27749 (or 27746 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 249687 is about 499.6869019696. The cubic root of 249687 is about 62.9697511627.

The spelling of 249687 in words is "two hundred forty-nine thousand, six hundred eighty-seven".