999994397 has 2 divisors, whose sum is σ = 999994398. Its totient is φ = 999994396.

The previous prime is 999994381. The next prime is 999994423. The reversal of 999994397 is 793499999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 983825956 + 16168441 = 31366^2 + 4021^2 .

It is a cyclic number.

It is not a de Polignac number, because 999994397 - 2⁴ = 999994381 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999994337) 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, 499997198 + 499997199.

It is an arithmetic number, because the mean of its divisors is an integer number (499997199).

Almost surely, 2^999994397 is an apocalyptic number.

It is an amenable number.

999994397 is a deficient number, since it is larger than the sum of its proper divisors (1).

999994397 is an equidigital number, since it uses as much as digits as its factorization.

999994397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44641044, while the sum is 68.

The square root of 999994397 is about 31622.6880103510. The cubic root of 999994397 is about 999.9981323298.

The spelling of 999994397 in words is "nine hundred ninety-nine million, nine hundred ninety-four thousand, three hundred ninety-seven".