249768149 has 2 divisors, whose sum is σ = 249768150. Its totient is φ = 249768148.

The previous prime is 249768133. The next prime is 249768157. The reversal of 249768149 is 941867942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219573124 + 30195025 = 14818^2 + 5495^2 .

It is a cyclic number.

It is not a de Polignac number, because 249768149 - 2⁴ = 249768133 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 249768097 and 249768106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249768119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124884074 + 124884075.

It is an arithmetic number, because the mean of its divisors is an integer number (124884075).

Almost surely, 2^249768149 is an apocalyptic number.

It is an amenable number.

249768149 is a deficient number, since it is larger than the sum of its proper divisors (1).

249768149 is an equidigital number, since it uses as much as digits as its factorization.

249768149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 50.

The square root of 249768149 is about 15804.0548277966. The cubic root of 249768149 is about 629.7657220778.

The spelling of 249768149 in words is "two hundred forty-nine million, seven hundred sixty-eight thousand, one hundred forty-nine".