2128190293 has 4 divisors (see below), whose sum is σ = 2130606828. Its totient is φ = 2125773760.

The previous prime is 2128190279. The next prime is 2128190327. The reversal of 2128190293 is 3920918212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1431335889 + 696854404 = 37833^2 + 26398^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128190293 - 2²⁹ = 1591319381 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 (2128190213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1206946 + ... + 1208707.

It is an arithmetic number, because the mean of its divisors is an integer number (532651707).

Almost surely, 2^2128190293 is an apocalyptic number.

It is an amenable number.

2128190293 is a deficient number, since it is larger than the sum of its proper divisors (2416535).

2128190293 is an equidigital number, since it uses as much as digits as its factorization.

2128190293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416534.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 2128190293 is about 46132.3128945428. The cubic root of 2128190293 is about 1286.2838572833.

The spelling of 2128190293 in words is "two billion, one hundred twenty-eight million, one hundred ninety thousand, two hundred ninety-three".