995231209 has 6 divisors (see below), whose sum is σ = 1157717994. Its totient is φ = 853055280.

The previous prime is 995231207. The next prime is 995231213. The reversal of 995231209 is 902132599.

995231209 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., 525555625 + 469675584 = 22925^2 + 21672^2 .

It is not a de Polignac number, because 995231209 - 2¹ = 995231207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (995231203) 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, 10155372 + ... + 10155469.

It is an arithmetic number, because the mean of its divisors is an integer number (192952999).

Almost surely, 2^995231209 is an apocalyptic number.

It is an amenable number.

995231209 is a deficient number, since it is larger than the sum of its proper divisors (162486785).

995231209 is a wasteful number, since it uses less digits than its factorization.

995231209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20310855 (or 20310848 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 995231209 is about 31547.2852873270. The cubic root of 995231209 is about 998.4078694656.

The spelling of 995231209 in words is "nine hundred ninety-five million, two hundred thirty-one thousand, two hundred nine".