248909 has 2 divisors, whose sum is σ = 248910. Its totient is φ = 248908.

The previous prime is 248903. The next prime is 248971. The reversal of 248909 is 909842.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184900 + 64009 = 430^2 + 253^2 .

It is a cyclic number.

It is not a de Polignac number, because 248909 - 2⁴ = 248893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124454 + 124455.

It is an arithmetic number, because the mean of its divisors is an integer number (124455).

2²⁴⁸⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

248909 is a deficient number, since it is larger than the sum of its proper divisors (1).

248909 is an equidigital number, since it uses as much as digits as its factorization.

248909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 248909 is about 498.9078071147. The cubic root of 248909 is about 62.9042806098.

The spelling of 248909 in words is "two hundred forty-eight thousand, nine hundred nine".