249647 has 2 divisors, whose sum is σ = 249648. Its totient is φ = 249646.

The previous prime is 249607. The next prime is 249659. The reversal of 249647 is 746942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249647 - 2⁶ = 249583 is a prime.

It is a Chen 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 249647.

It is not a weakly prime, because it can be changed into another 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 as a sum of consecutive naturals, namely, 124823 + 124824.

It is an arithmetic number, because the mean of its divisors is an integer number (124824).

2²⁴⁹⁶⁴⁷ is an apocalyptic number.

249647 is a deficient number, since it is larger than the sum of its proper divisors (1).

249647 is an equidigital number, since it uses as much as digits as its factorization.

249647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 249647 is about 499.6468753029. The cubic root of 249647 is about 62.9663883864.

The spelling of 249647 in words is "two hundred forty-nine thousand, six hundred forty-seven".