999996611 has 2 divisors, whose sum is σ = 999996612. Its totient is φ = 999996610.

The previous prime is 999996587. The next prime is 999996643. The reversal of 999996611 is 116699999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999996611 - 2¹⁸ = 999734467 is a prime.

It is a super-2 number, since 2×999996611² = 1999986444022970642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is not a weakly prime, because it can be changed into another prime (999996671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499998305 + 499998306.

It is an arithmetic number, because the mean of its divisors is an integer number (499998306).

Almost surely, 2^999996611 is an apocalyptic number.

999996611 is a deficient number, since it is larger than the sum of its proper divisors (1).

999996611 is an equidigital number, since it uses as much as digits as its factorization.

999996611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2125764, while the sum is 59.

The square root of 999996611 is about 31622.7230168434. The cubic root of 999996611 is about 999.9988703321.

The spelling of 999996611 in words is "nine hundred ninety-nine million, nine hundred ninety-six thousand, six hundred eleven".