8529728749 has 2 divisors, whose sum is σ = 8529728750. Its totient is φ = 8529728748.

The previous prime is 8529728747. The next prime is 8529728783. The reversal of 8529728749 is 9478279258.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6783993225 + 1745735524 = 82365^2 + 41782^2 .

It is a cyclic number.

It is not a de Polignac number, because 8529728749 - 2¹ = 8529728747 is a prime.

Together with 8529728747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8529728741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4264864374 + 4264864375.

It is an arithmetic number, because the mean of its divisors is an integer number (4264864375).

Almost surely, 2^8529728749 is an apocalyptic number.

It is an amenable number.

8529728749 is a deficient number, since it is larger than the sum of its proper divisors (1).

8529728749 is an equidigital number, since it uses as much as digits as its factorization.

8529728749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 61.

The square root of 8529728749 is about 92356.5306245314. The cubic root of 8529728749 is about 2043.2040472163.

The spelling of 8529728749 in words is "eight billion, five hundred twenty-nine million, seven hundred twenty-eight thousand, seven hundred forty-nine".