8709409249 has 2 divisors, whose sum is σ = 8709409250. Its totient is φ = 8709409248.

The previous prime is 8709409211. The next prime is 8709409271. The reversal of 8709409249 is 9429049078.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6151578624 + 2557830625 = 78432^2 + 50575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8709409249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8709409196 and 8709409205.

It is not a weakly prime, because it can be changed into another prime (8709409279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4354704624 + 4354704625.

It is an arithmetic number, because the mean of its divisors is an integer number (4354704625).

Almost surely, 2^8709409249 is an apocalyptic number.

It is an amenable number.

8709409249 is a deficient number, since it is larger than the sum of its proper divisors (1).

8709409249 is an equidigital number, since it uses as much as digits as its factorization.

8709409249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 8709409249 is about 93324.2157695418. The cubic root of 8709409249 is about 2057.4513087429.

The spelling of 8709409249 in words is "eight billion, seven hundred nine million, four hundred nine thousand, two hundred forty-nine".