2128393 has 4 divisors (see below), whose sum is σ = 2145280. Its totient is φ = 2111508.

The previous prime is 2128391. The next prime is 2128403. The reversal of 2128393 is 3938212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2128393 - 2¹ = 2128391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2128391) 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, 8253 + ... + 8506.

It is an arithmetic number, because the mean of its divisors is an integer number (536320).

2^2128393 is an apocalyptic number.

It is an amenable number.

2128393 is a deficient number, since it is larger than the sum of its proper divisors (16887).

2128393 is a wasteful number, since it uses less digits than its factorization.

2128393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16886.

The product of its digits is 2592, while the sum is 28.

The square root of 2128393 is about 1458.9012989233. The cubic root of 2128393 is about 128.6324694870.

The spelling of 2128393 in words is "two million, one hundred twenty-eight thousand, three hundred ninety-three".