248228909 has 2 divisors, whose sum is σ = 248228910. Its totient is φ = 248228908.

The previous prime is 248228899. The next prime is 248228933. The reversal of 248228909 is 909822842.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244046884 + 4182025 = 15622^2 + 2045^2 .

It is a cyclic number.

It is not a de Polignac number, because 248228909 - 2¹⁶ = 248163373 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 248228909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248228969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124114454 + 124114455.

It is an arithmetic number, because the mean of its divisors is an integer number (124114455).

Almost surely, 2^248228909 is an apocalyptic number.

It is an amenable number.

248228909 is a deficient number, since it is larger than the sum of its proper divisors (1).

248228909 is an equidigital number, since it uses as much as digits as its factorization.

248228909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 248228909 is about 15755.2819397179. The cubic root of 248228909 is about 628.4693748794.

The spelling of 248228909 in words is "two hundred forty-eight million, two hundred twenty-eight thousand, nine hundred nine".