249533 has 2 divisors, whose sum is σ = 249534. Its totient is φ = 249532.

The previous prime is 249521. The next prime is 249539. The reversal of 249533 is 335942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190969 + 58564 = 437^2 + 242^2 .

It is a cyclic number.

It is not a de Polignac number, because 249533 - 2⁴ = 249517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

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 249533.

It is not a weakly prime, because it can be changed into another prime (249539) 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, 124766 + 124767.

It is an arithmetic number, because the mean of its divisors is an integer number (124767).

2²⁴⁹⁵³³ is an apocalyptic number.

It is an amenable number.

249533 is a deficient number, since it is larger than the sum of its proper divisors (1).

249533 is an equidigital number, since it uses as much as digits as its factorization.

249533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 26.

The square root of 249533 is about 499.5327817071. The cubic root of 249533 is about 62.9568025029.

The spelling of 249533 in words is "two hundred forty-nine thousand, five hundred thirty-three".