249568117 has 2 divisors, whose sum is σ = 249568118. Its totient is φ = 249568116.

The previous prime is 249568063. The next prime is 249568129. The reversal of 249568117 is 711865942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146870161 + 102697956 = 12119^2 + 10134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249568117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249568717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124784058 + 124784059.

It is an arithmetic number, because the mean of its divisors is an integer number (124784059).

Almost surely, 2^249568117 is an apocalyptic number.

It is an amenable number.

249568117 is a deficient number, since it is larger than the sum of its proper divisors (1).

249568117 is an equidigital number, since it uses as much as digits as its factorization.

249568117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 249568117 is about 15797.7250577417. The cubic root of 249568117 is about 629.5975568656.

The spelling of 249568117 in words is "two hundred forty-nine million, five hundred sixty-eight thousand, one hundred seventeen".