8912509 has 2 divisors, whose sum is σ = 8912510. Its totient is φ = 8912508.

The previous prime is 8912489. The next prime is 8912537. The reversal of 8912509 is 9052198.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7868025 + 1044484 = 2805^2 + 1022^2 .

It is a cyclic number.

It is not a de Polignac number, because 8912509 - 2⁷ = 8912381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8912209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4456254 + 4456255.

It is an arithmetic number, because the mean of its divisors is an integer number (4456255).

Almost surely, 2^8912509 is an apocalyptic number.

It is an amenable number.

8912509 is a deficient number, since it is larger than the sum of its proper divisors (1).

8912509 is an equidigital number, since it uses as much as digits as its factorization.

8912509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 8912509 is about 2985.3825550505. The cubic root of 8912509 is about 207.3321543916.

The spelling of 8912509 in words is "eight million, nine hundred twelve thousand, five hundred nine".