249992317 has 2 divisors, whose sum is σ = 249992318. Its totient is φ = 249992316.

The previous prime is 249992299. The next prime is 249992363. The reversal of 249992317 is 713299942.

It is a happy number.

It is an a-pointer prime, because the next prime (249992363) can be obtained adding 249992317 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 248724441 + 1267876 = 15771^2 + 1126^2 .

It is a cyclic number.

It is not a de Polignac number, because 249992317 - 2¹¹ = 249990269 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249990317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124996158 + 124996159.

It is an arithmetic number, because the mean of its divisors is an integer number (124996159).

Almost surely, 2^249992317 is an apocalyptic number.

It is an amenable number.

249992317 is a deficient number, since it is larger than the sum of its proper divisors (1).

249992317 is an equidigital number, since it uses as much as digits as its factorization.

249992317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 46.

The square root of 249992317 is about 15811.1453411826. The cubic root of 249992317 is about 629.9540715657.

The spelling of 249992317 in words is "two hundred forty-nine million, nine hundred ninety-two thousand, three hundred seventeen".