2128945973 has 24 divisors (see below), whose sum is σ = 2728486944. Its totient is φ = 1642452000.

The previous prime is 2128945969. The next prime is 2128946003. The reversal of 2128945973 is 3795498212.

It is not a de Polignac number, because 2128945973 - 2² = 2128945969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128945943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34886 + ... + 73992.

It is an arithmetic number, because the mean of its divisors is an integer number (113686956).

Almost surely, 2^2128945973 is an apocalyptic number.

It is an amenable number.

2128945973 is a deficient number, since it is larger than the sum of its proper divisors (599540971).

2128945973 is a wasteful number, since it uses less digits than its factorization.

2128945973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39233 (or 39226 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 50.

The square root of 2128945973 is about 46140.5025221876. The cubic root of 2128945973 is about 1286.4360842658.

The spelling of 2128945973 in words is "two billion, one hundred twenty-eight million, nine hundred forty-five thousand, nine hundred seventy-three".