250009813 has 2 divisors, whose sum is σ = 250009814. Its totient is φ = 250009812.

The previous prime is 250009801. The next prime is 250009819. The reversal of 250009813 is 318900052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192598884 + 57410929 = 13878^2 + 7577^2 .

It is a cyclic number.

It is not a de Polignac number, because 250009813 - 2⁹ = 250009301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250009819) 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, 125004906 + 125004907.

It is an arithmetic number, because the mean of its divisors is an integer number (125004907).

Almost surely, 2^250009813 is an apocalyptic number.

It is an amenable number.

250009813 is a deficient number, since it is larger than the sum of its proper divisors (1).

250009813 is an equidigital number, since it uses as much as digits as its factorization.

250009813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 250009813 is about 15811.6986121036. The cubic root of 250009813 is about 629.9687672431.

Adding to 250009813 its reverse (318900052), we get a palindrome (568909865).

The spelling of 250009813 in words is "two hundred fifty million, nine thousand, eight hundred thirteen".