999495973 has 6 divisors (see below), whose sum is σ = 1162679046. Its totient is φ = 856710792.

The previous prime is 999495941. The next prime is 999495983. The reversal of 999495973 is 379594999.

999495973 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., 566106849 + 433389124 = 23793^2 + 20818^2 .

It is not a de Polignac number, because 999495973 - 2⁵ = 999495941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999495983) 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, 10198890 + ... + 10198987.

It is an arithmetic number, because the mean of its divisors is an integer number (193779841).

Almost surely, 2^999495973 is an apocalyptic number.

It is an amenable number.

999495973 is a deficient number, since it is larger than the sum of its proper divisors (163183073).

999495973 is a wasteful number, since it uses less digits than its factorization.

999495973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20397891 (or 20397884 counting only the distinct ones).

The product of its digits is 24800580, while the sum is 64.

The square root of 999495973 is about 31614.8062306255. The cubic root of 999495973 is about 999.8319627651.

The spelling of 999495973 in words is "nine hundred ninety-nine million, four hundred ninety-five thousand, nine hundred seventy-three".