999113773 has 6 divisors (see below), whose sum is σ = 1162234446. Its totient is φ = 856383192.

The previous prime is 999113743. The next prime is 999113777. The reversal of 999113773 is 377311999.

999113773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 953389129 + 45724644 = 30877^2 + 6762^2 .

It is not a de Polignac number, because 999113773 - 2⁵ = 999113741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 20390077 = 999113773 / (9 + 9 + 9 + 1 + 1 + 3 + 7 + 7 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999113777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10194990 + ... + 10195087.

It is an arithmetic number, because the mean of its divisors is an integer number (193705741).

Almost surely, 2^999113773 is an apocalyptic number.

It is an amenable number.

999113773 is a deficient number, since it is larger than the sum of its proper divisors (163120673).

999113773 is a wasteful number, since it uses less digits than its factorization.

999113773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20390091 (or 20390084 counting only the distinct ones).

The product of its digits is 321489, while the sum is 49.

The square root of 999113773 is about 31608.7610165283. The cubic root of 999113773 is about 999.7045036905.

It can be divided in two parts, 99911 and 3773, that added together give a square (103684 = 322²).

The spelling of 999113773 in words is "nine hundred ninety-nine million, one hundred thirteen thousand, seven hundred seventy-three".