8951316509 has 2 divisors, whose sum is σ = 8951316510. Its totient is φ = 8951316508.

The previous prime is 8951316457. The next prime is 8951316529. The reversal of 8951316509 is 9056131598.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7904988100 + 1046328409 = 88910^2 + 32347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8951316509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8951316529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4475658254 + 4475658255.

It is an arithmetic number, because the mean of its divisors is an integer number (4475658255).

Almost surely, 2^8951316509 is an apocalyptic number.

It is an amenable number.

8951316509 is a deficient number, since it is larger than the sum of its proper divisors (1).

8951316509 is an equidigital number, since it uses as much as digits as its factorization.

8951316509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 47.

The square root of 8951316509 is about 94611.3973525389. The cubic root of 8951316509 is about 2076.3264569683.

The spelling of 8951316509 in words is "eight billion, nine hundred fifty-one million, three hundred sixteen thousand, five hundred nine".