249957473 has 2 divisors, whose sum is σ = 249957474. Its totient is φ = 249957472.

The previous prime is 249957439. The next prime is 249957497. The reversal of 249957473 is 374759942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129572689 + 120384784 = 11383^2 + 10972^2 .

It is a cyclic number.

It is not a de Polignac number, because 249957473 - 2¹⁰ = 249956449 is a prime.

It is not a weakly prime, because it can be changed into another prime (249957173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124978736 + 124978737.

It is an arithmetic number, because the mean of its divisors is an integer number (124978737).

Almost surely, 2^249957473 is an apocalyptic number.

It is an amenable number.

249957473 is a deficient number, since it is larger than the sum of its proper divisors (1).

249957473 is an equidigital number, since it uses as much as digits as its factorization.

249957473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 50.

The square root of 249957473 is about 15810.0434218253. The cubic root of 249957473 is about 629.9248024801.

The spelling of 249957473 in words is "two hundred forty-nine million, nine hundred fifty-seven thousand, four hundred seventy-three".