999994973 has 2 divisors, whose sum is σ = 999994974. Its totient is φ = 999994972.

The previous prime is 999994951. The next prime is 999994979. The reversal of 999994973 is 379499999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614147524 + 385847449 = 24782^2 + 19643^2 .

It is a cyclic number.

It is not a de Polignac number, because 999994973 - 2¹² = 999990877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999994979) 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, 499997486 + 499997487.

It is an arithmetic number, because the mean of its divisors is an integer number (499997487).

Almost surely, 2^999994973 is an apocalyptic number.

It is an amenable number.

999994973 is a deficient number, since it is larger than the sum of its proper divisors (1).

999994973 is an equidigital number, since it uses as much as digits as its factorization.

999994973 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 999994973 is about 31622.6971177349. The cubic root of 999994973 is about 999.9983243305.

The spelling of 999994973 in words is "nine hundred ninety-nine million, nine hundred ninety-four thousand, nine hundred seventy-three".