999900017 has 2 divisors, whose sum is σ = 999900018. Its totient is φ = 999900016.

The previous prime is 999899987. The next prime is 999900047. The reversal of 999900017 is 710009999.

It is a balanced prime because it is at equal distance from previous prime (999899987) and next prime (999900047).

It can be written as a sum of positive squares in only one way, i.e., 915425536 + 84474481 = 30256^2 + 9191^2 .

It is a cyclic number.

It is not a de Polignac number, because 999900017 - 2²² = 995705713 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999900047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499950008 + 499950009.

It is an arithmetic number, because the mean of its divisors is an integer number (499950009).

Almost surely, 2^999900017 is an apocalyptic number.

It is an amenable number.

999900017 is a deficient number, since it is larger than the sum of its proper divisors (1).

999900017 is an equidigital number, since it uses as much as digits as its factorization.

999900017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 44.

The square root of 999900017 is about 31621.1956921303. The cubic root of 999900017 is about 999.9666712225.

The spelling of 999900017 in words is "nine hundred ninety-nine million, nine hundred thousand, seventeen".