999994649 has 2 divisors, whose sum is σ = 999994650.
Its totient is φ = 999994648.
The previous prime is 999994613. The next prime is 999994651. The reversal of 999994649 is 946499999.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 995718025 + 4276624 = 31555^2 + 2068^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-999994649 is a prime.
Together with 999994651, it forms a pair of twin primes.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (999994609) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499997324 + 499997325.
It is an arithmetic number, because the mean of its divisors is an integer number (499997325).
Almost surely, 2999994649 is an apocalyptic number.
It is an amenable number.
999994649 is a deficient number, since it is larger than the sum of its proper divisors (1).
999994649 is an equidigital number, since it uses as much as digits as its factorization.
999994649 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 51018336, while the sum is 68.
The square root of 999994649 is about 31622.6919948318.
The cubic root of 999994649 is about 999.9982163302.
The spelling of 999994649 in words is "nine hundred ninety-nine million, nine hundred ninety-four thousand, six hundred forty-nine".