8521205753 has 2 divisors, whose sum is σ = 8521205754. Its totient is φ = 8521205752.

The previous prime is 8521205741. The next prime is 8521205789. The reversal of 8521205753 is 3575021258.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8026009744 + 495196009 = 89588^2 + 22253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8521205753 is a prime.

It is a super-2 number, since 2×8521205753² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8521205153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4260602876 + 4260602877.

It is an arithmetic number, because the mean of its divisors is an integer number (4260602877).

Almost surely, 2^8521205753 is an apocalyptic number.

It is an amenable number.

8521205753 is a deficient number, since it is larger than the sum of its proper divisors (1).

8521205753 is an equidigital number, since it uses as much as digits as its factorization.

8521205753 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 8521205753 is about 92310.3772768804. The cubic root of 8521205753 is about 2042.5232899959.

The spelling of 8521205753 in words is "eight billion, five hundred twenty-one million, two hundred five thousand, seven hundred fifty-three".