9115925509 has 2 divisors, whose sum is σ = 9115925510. Its totient is φ = 9115925508.

The previous prime is 9115925477. The next prime is 9115925543. The reversal of 9115925509 is 9055295119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8982869284 + 133056225 = 94778^2 + 11535^2 .

It is a cyclic number.

It is not a de Polignac number, because 9115925509 - 2⁵ = 9115925477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9115920509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4557962754 + 4557962755.

It is an arithmetic number, because the mean of its divisors is an integer number (4557962755).

Almost surely, 2^9115925509 is an apocalyptic number.

It is an amenable number.

9115925509 is a deficient number, since it is larger than the sum of its proper divisors (1).

9115925509 is an equidigital number, since it uses as much as digits as its factorization.

9115925509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 182250, while the sum is 46.

The square root of 9115925509 is about 95477.3560013054. The cubic root of 9115925509 is about 2088.9766675113.

The spelling of 9115925509 in words is "nine billion, one hundred fifteen million, nine hundred twenty-five thousand, five hundred nine".