2103965161 has 3 divisors (see below), whose sum is σ = 2104011031. Its totient is φ = 2103919292.

The previous prime is 2103965153. The next prime is 2103965173. The reversal of 2103965161 is 1615693012.

The square root of 2103965161 is 45869.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1457788761 + 646176400 = 38181^2 + 25420^2 .

It is not a de Polignac number, because 2103965161 - 2³ = 2103965153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2103965141) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 22935 + ... + 68803.

Almost surely, 2^2103965161 is an apocalyptic number.

2103965161 is the 45869-th square number.

2103965161 is the 22935-th centered octagonal number.

It is an amenable number.

2103965161 is a deficient number, since it is larger than the sum of its proper divisors (45870).

2103965161 is an frugal number, since it uses more digits than its factorization.

2103965161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91738 (or 45869 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The cubic root of 2103965161 is about 1281.3846427736.

The spelling of 2103965161 in words is "two billion, one hundred three million, nine hundred sixty-five thousand, one hundred sixty-one".