999907 has 2 divisors, whose sum is σ = 999908.
Its totient is φ = 999906.
The previous prime is 999883. The next prime is 999917. The reversal of 999907 is 709999.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 999907 - 215 = 967139 is a prime.
It is not a weakly prime, because it can be changed into another prime (999917) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499953 + 499954.
It is an arithmetic number, because the mean of its divisors is an integer number (499954).
2999907 is an apocalyptic number.
999907 is a deficient number, since it is larger than the sum of its proper divisors (1).
999907 is an equidigital number, since it uses as much as digits as its factorization.
999907 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 45927, while the sum is 43.
The square root of 999907 is about 999.9534989188.
The cubic root of 999907 is about 99.9968999039.
The spelling of 999907 in words is "nine hundred ninety-nine thousand, nine hundred seven".