249561349 has 2 divisors, whose sum is σ = 249561350. Its totient is φ = 249561348.

The previous prime is 249561311. The next prime is 249561401. The reversal of 249561349 is 943165942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201356100 + 48205249 = 14190^2 + 6943^2 .

It is a cyclic number.

It is not a de Polignac number, because 249561349 - 2⁹ = 249560837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249561049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124780674 + 124780675.

It is an arithmetic number, because the mean of its divisors is an integer number (124780675).

Almost surely, 2^249561349 is an apocalyptic number.

It is an amenable number.

249561349 is a deficient number, since it is larger than the sum of its proper divisors (1).

249561349 is an equidigital number, since it uses as much as digits as its factorization.

249561349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 43.

The square root of 249561349 is about 15797.5108482318. The cubic root of 249561349 is about 629.5918654939.

The spelling of 249561349 in words is "two hundred forty-nine million, five hundred sixty-one thousand, three hundred forty-nine".