8488720309 has 2 divisors, whose sum is σ = 8488720310. Its totient is φ = 8488720308.

The previous prime is 8488720283. The next prime is 8488720333. The reversal of 8488720309 is 9030278848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6918579684 + 1570140625 = 83178^2 + 39625^2 .

It is a cyclic number.

It is not a de Polignac number, because 8488720309 - 2⁹ = 8488719797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8488720349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4244360154 + 4244360155.

It is an arithmetic number, because the mean of its divisors is an integer number (4244360155).

Almost surely, 2^8488720309 is an apocalyptic number.

It is an amenable number.

8488720309 is a deficient number, since it is larger than the sum of its proper divisors (1).

8488720309 is an equidigital number, since it uses as much as digits as its factorization.

8488720309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 8488720309 is about 92134.2515517438. The cubic root of 8488720309 is about 2039.9244100051.

The spelling of 8488720309 in words is "eight billion, four hundred eighty-eight million, seven hundred twenty thousand, three hundred nine".