999845017 has 2 divisors, whose sum is σ = 999845018. Its totient is φ = 999845016.

The previous prime is 999844973. The next prime is 999845059. The reversal of 999845017 is 710548999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 865771776 + 134073241 = 29424^2 + 11579^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999845017 is a prime.

It is not a weakly prime, because it can be changed into another prime (999849017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499922508 + 499922509.

It is an arithmetic number, because the mean of its divisors is an integer number (499922509).

Almost surely, 2^999845017 is an apocalyptic number.

It is an amenable number.

999845017 is a deficient number, since it is larger than the sum of its proper divisors (1).

999845017 is an equidigital number, since it uses as much as digits as its factorization.

999845017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 52.

The square root of 999845017 is about 31620.3260103371. The cubic root of 999845017 is about 999.9483363309.

The spelling of 999845017 in words is "nine hundred ninety-nine million, eight hundred forty-five thousand, seventeen".