999796009 has 2 divisors, whose sum is σ = 999796010. Its totient is φ = 999796008.

The previous prime is 999795983. The next prime is 999796067. The reversal of 999796009 is 900697999.

It is a happy number.

It is an a-pointer prime, because the next prime (999796067) can be obtained adding 999796009 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 992250000 + 7546009 = 31500^2 + 2747^2 .

It is a cyclic number.

It is not a de Polignac number, because 999796009 - 2⁹ = 999795497 is a prime.

It is a super-2 number, since 2×999796009² = 1999184119224656162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999796409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499898004 + 499898005.

It is an arithmetic number, because the mean of its divisors is an integer number (499898005).

Almost surely, 2^999796009 is an apocalyptic number.

It is an amenable number.

999796009 is a deficient number, since it is larger than the sum of its proper divisors (1).

999796009 is an equidigital number, since it uses as much as digits as its factorization.

999796009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2480058, while the sum is 58.

The square root of 999796009 is about 31619.5510562690. The cubic root of 999796009 is about 999.9319983759.

The spelling of 999796009 in words is "nine hundred ninety-nine million, seven hundred ninety-six thousand, nine".