999906227 has 2 divisors, whose sum is σ = 999906228. Its totient is φ = 999906226.

The previous prime is 999906223. The next prime is 999906251. The reversal of 999906227 is 722609999.

It is a weak prime.

It is an emirp because it is prime and its reverse (722609999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999906227 - 2² = 999906223 is a prime.

It is not a weakly prime, because it can be changed into another prime (999906223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499953113 + 499953114.

It is an arithmetic number, because the mean of its divisors is an integer number (499953114).

Almost surely, 2^999906227 is an apocalyptic number.

999906227 is a deficient number, since it is larger than the sum of its proper divisors (1).

999906227 is an equidigital number, since it uses as much as digits as its factorization.

999906227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The square root of 999906227 is about 31621.2938856082. The cubic root of 999906227 is about 999.9687413562.

The spelling of 999906227 in words is "nine hundred ninety-nine million, nine hundred six thousand, two hundred twenty-seven".