999727973 has 2 divisors, whose sum is σ = 999727974. Its totient is φ = 999727972.

The previous prime is 999727909. The next prime is 999727987. The reversal of 999727973 is 379727999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 798740644 + 200987329 = 28262^2 + 14177^2 .

It is a cyclic number.

It is not a de Polignac number, because 999727973 - 2⁶ = 999727909 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 (999727273) 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, 499863986 + 499863987.

It is an arithmetic number, because the mean of its divisors is an integer number (499863987).

Almost surely, 2^999727973 is an apocalyptic number.

It is an amenable number.

999727973 is a deficient number, since it is larger than the sum of its proper divisors (1).

999727973 is an equidigital number, since it uses as much as digits as its factorization.

999727973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13502538, while the sum is 62.

The square root of 999727973 is about 31618.4751846132. The cubic root of 999727973 is about 999.9093161100.

The spelling of 999727973 in words is "nine hundred ninety-nine million, seven hundred twenty-seven thousand, nine hundred seventy-three".