249230135665109 has 2 divisors, whose sum is σ = 249230135665110. Its totient is φ = 249230135665108.

The previous prime is 249230135664907. The next prime is 249230135665171. The reversal of 249230135665109 is 901566531032942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245016878590225 + 4213257074884 = 15653015^2 + 2052622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249230135665109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249230135265109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124615067832554 + 124615067832555.

It is an arithmetic number, because the mean of its divisors is an integer number (124615067832555).

Almost surely, 2^{249230135665109} is an apocalyptic number.

It is an amenable number.

249230135665109 is a deficient number, since it is larger than the sum of its proper divisors (1).

249230135665109 is an equidigital number, since it uses as much as digits as its factorization.

249230135665109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10497600, while the sum is 56.

The spelling of 249230135665109 in words is "two hundred forty-nine trillion, two hundred thirty billion, one hundred thirty-five million, six hundred sixty-five thousand, one hundred nine".