996209161 has 8 divisors (see below), whose sum is σ = 1000364040. Its totient is φ = 992063232.

The previous prime is 996209153. The next prime is 996209191. The reversal of 996209161 is 161902699.

It can be written as a sum of positive squares in 4 ways, for example, as 57093136 + 939116025 = 7556^2 + 30645^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 996209161 - 2³ = 996209153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (996209111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299041 + ... + 302353.

It is an arithmetic number, because the mean of its divisors is an integer number (125045505).

Almost surely, 2^996209161 is an apocalyptic number.

It is an amenable number.

996209161 is a deficient number, since it is larger than the sum of its proper divisors (4154879).

996209161 is a wasteful number, since it uses less digits than its factorization.

996209161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4475.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 996209161 is about 31562.7812621131. The cubic root of 996209161 is about 998.7347869109.

The spelling of 996209161 in words is "nine hundred ninety-six million, two hundred nine thousand, one hundred sixty-one".