249885949 has 2 divisors, whose sum is σ = 249885950. Its totient is φ = 249885948.

The previous prime is 249885893. The next prime is 249885971. The reversal of 249885949 is 949588942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193905625 + 55980324 = 13925^2 + 7482^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249885949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249885893 and 249885902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249885989) 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, 124942974 + 124942975.

It is an arithmetic number, because the mean of its divisors is an integer number (124942975).

Almost surely, 2^249885949 is an apocalyptic number.

It is an amenable number.

249885949 is a deficient number, since it is larger than the sum of its proper divisors (1).

249885949 is an equidigital number, since it uses as much as digits as its factorization.

249885949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7464960, while the sum is 58.

The square root of 249885949 is about 15807.7812801164. The cubic root of 249885949 is about 629.8647135390.

The spelling of 249885949 in words is "two hundred forty-nine million, eight hundred eighty-five thousand, nine hundred forty-nine".