999957773 has 2 divisors, whose sum is σ = 999957774. Its totient is φ = 999957772.

The previous prime is 999957767. The next prime is 999957779. The reversal of 999957773 is 377759999.

999957773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (999957767) and next prime (999957779).

It can be written as a sum of positive squares in only one way, i.e., 999950884 + 6889 = 31622^2 + 83^2 .

It is an emirp because it is prime and its reverse (377759999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999957773 - 2¹⁴ = 999941389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999957779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499978886 + 499978887.

It is an arithmetic number, because the mean of its divisors is an integer number (499978887).

Almost surely, 2^999957773 is an apocalyptic number.

It is an amenable number.

999957773 is a deficient number, since it is larger than the sum of its proper divisors (1).

999957773 is an equidigital number, since it uses as much as digits as its factorization.

999957773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33756345, while the sum is 65.

The square root of 999957773 is about 31622.1089271415. The cubic root of 999957773 is about 999.9859241352.

The spelling of 999957773 in words is "nine hundred ninety-nine million, nine hundred fifty-seven thousand, seven hundred seventy-three".