917996089 has 2 divisors, whose sum is σ = 917996090. Its totient is φ = 917996088.

The previous prime is 917996081. The next prime is 917996099. The reversal of 917996089 is 980699719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 783552064 + 134444025 = 27992^2 + 11595^2 .

It is an emirp because it is prime and its reverse (980699719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 917996089 - 2³ = 917996081 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (917996081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458998044 + 458998045.

It is an arithmetic number, because the mean of its divisors is an integer number (458998045).

Almost surely, 2^917996089 is an apocalyptic number.

It is an amenable number.

917996089 is a deficient number, since it is larger than the sum of its proper divisors (1).

917996089 is an equidigital number, since it uses as much as digits as its factorization.

917996089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 58.

The square root of 917996089 is about 30298.4502739001. The cubic root of 917996089 is about 971.8821601937.

The spelling of 917996089 in words is "nine hundred seventeen million, nine hundred ninety-six thousand, eighty-nine".