8709520249 has 2 divisors, whose sum is σ = 8709520250. Its totient is φ = 8709520248.

The previous prime is 8709520231. The next prime is 8709520279. The reversal of 8709520249 is 9420259078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4904481024 + 3805039225 = 70032^2 + 61685^2 .

It is a cyclic number.

It is not a de Polignac number, because 8709520249 - 2¹³ = 8709512057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8709520199 and 8709520208.

It is not a weakly prime, because it can be changed into another prime (8709520279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4354760124 + 4354760125.

It is an arithmetic number, because the mean of its divisors is an integer number (4354760125).

Almost surely, 2^8709520249 is an apocalyptic number.

It is an amenable number.

8709520249 is a deficient number, since it is larger than the sum of its proper divisors (1).

8709520249 is an equidigital number, since it uses as much as digits as its factorization.

8709520249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 8709520249 is about 93324.8104685994. The cubic root of 8709520249 is about 2057.4600493329.

The spelling of 8709520249 in words is "eight billion, seven hundred nine million, five hundred twenty thousand, two hundred forty-nine".