248500409 has 2 divisors, whose sum is σ = 248500410. Its totient is φ = 248500408.

The previous prime is 248500381. The next prime is 248500429. The reversal of 248500409 is 904005842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145274809 + 103225600 = 12053^2 + 10160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248500409 is a prime.

It is not a weakly prime, because it can be changed into another prime (248500429) 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, 124250204 + 124250205.

It is an arithmetic number, because the mean of its divisors is an integer number (124250205).

Almost surely, 2^248500409 is an apocalyptic number.

It is an amenable number.

248500409 is a deficient number, since it is larger than the sum of its proper divisors (1).

248500409 is an equidigital number, since it uses as much as digits as its factorization.

248500409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 248500409 is about 15763.8957431214. The cubic root of 248500409 is about 628.6984205416.

The spelling of 248500409 in words is "two hundred forty-eight million, five hundred thousand, four hundred nine".