249708533 has 2 divisors, whose sum is σ = 249708534. Its totient is φ = 249708532.

The previous prime is 249708467. The next prime is 249708551. The reversal of 249708533 is 335807942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249703204 + 5329 = 15802^2 + 73^2 .

It is a cyclic number.

It is not a de Polignac number, because 249708533 - 2¹⁶ = 249642997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249708593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124854266 + 124854267.

It is an arithmetic number, because the mean of its divisors is an integer number (124854267).

Almost surely, 2^249708533 is an apocalyptic number.

It is an amenable number.

249708533 is a deficient number, since it is larger than the sum of its proper divisors (1).

249708533 is an equidigital number, since it uses as much as digits as its factorization.

249708533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 249708533 is about 15802.1686169968. The cubic root of 249708533 is about 629.7156128053.

The spelling of 249708533 in words is "two hundred forty-nine million, seven hundred eight thousand, five hundred thirty-three".