9521248409 has 2 divisors, whose sum is σ = 9521248410. Its totient is φ = 9521248408.

The previous prime is 9521248393. The next prime is 9521248433. The reversal of 9521248409 is 9048421259.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5536104025 + 3985144384 = 74405^2 + 63128^2 .

It is a cyclic number.

It is not a de Polignac number, because 9521248409 - 2⁴ = 9521248393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9521248409.

It is not a weakly prime, because it can be changed into another prime (9521248489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4760624204 + 4760624205.

It is an arithmetic number, because the mean of its divisors is an integer number (4760624205).

Almost surely, 2^9521248409 is an apocalyptic number.

It is an amenable number.

9521248409 is a deficient number, since it is larger than the sum of its proper divisors (1).

9521248409 is an equidigital number, since it uses as much as digits as its factorization.

9521248409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 9521248409 is about 97576.8846038856. The cubic root of 9521248409 is about 2119.4896428577.

The spelling of 9521248409 in words is "nine billion, five hundred twenty-one million, two hundred forty-eight thousand, four hundred nine".