999773 has 2 divisors, whose sum is σ = 999774. Its totient is φ = 999772.

The previous prime is 999769. The next prime is 999809. The reversal of 999773 is 377999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 683929 + 315844 = 827^2 + 562^2 .

It is an emirp because it is prime and its reverse (377999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999773 - 2² = 999769 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 999773.

It is not a weakly prime, because it can be changed into another prime (999763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499886 + 499887.

It is an arithmetic number, because the mean of its divisors is an integer number (499887).

2⁹⁹⁹⁷⁷³ is an apocalyptic number.

It is an amenable number.

999773 is a deficient number, since it is larger than the sum of its proper divisors (1).

999773 is an equidigital number, since it uses as much as digits as its factorization.

999773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107163, while the sum is 44.

The square root of 999773 is about 999.8864935581. The cubic root of 999773 is about 99.9924327607.

The spelling of 999773 in words is "nine hundred ninety-nine thousand, seven hundred seventy-three".