999444997 has 2 divisors, whose sum is σ = 999444998. Its totient is φ = 999444996.

The previous prime is 999444983. The next prime is 999445039. The reversal of 999444997 is 799444999.

It is a Cunningham number, because it is equal to 31614²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 999444996 + 1 = 31614^2 + 1^2 .

It is an emirp because it is prime and its reverse (799444999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999444997 - 2⁷ = 999444869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999444917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499722498 + 499722499.

It is an arithmetic number, because the mean of its divisors is an integer number (499722499).

Almost surely, 2^999444997 is an apocalyptic number.

It is an amenable number.

999444997 is a deficient number, since it is larger than the sum of its proper divisors (1).

999444997 is an equidigital number, since it uses as much as digits as its factorization.

999444997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26453952, while the sum is 64.

The square root of 999444997 is about 31614.0000158158. Note that the first 4 decimals coincide. The cubic root of 999444997 is about 999.8149647641.

The spelling of 999444997 in words is "nine hundred ninety-nine million, four hundred forty-four thousand, nine hundred ninety-seven".